Clear Outside v1.0 - International Weather Forecasts For Astronomers

Sunday 31

Full Moon 100%

21:00

04:05

12 Good
13 Good
14 Good
15 Good
16 Good
17 Good
18 Good
19 Good
20 Good
21 Good
22 Good
23 Good
00 Bad
01 Bad
02 Bad
03 OK
04 Bad
05 Bad
06 Bad
07 Bad
08 Bad
09 Bad
10 Bad
11 Bad

Sun - Rise: 04:46, Set: 21:06, Transit: 12:57. Moon - Rise: 21:00, Set: 04:05. Civil Dark: 21:52 - 04:00. Nautical Dark: 23:00 - 02:52. Astro Dark: N/A - N/A

Total Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
0
0
100
50
61
32
99
94
96
98
100
100
100
98

Low Clouds (% Sky Obscured)

28
37
51
46
32
15
3
12
29
12
7
5
0
0
0
0
0
49
40
67
55
47
53
55

Medium Clouds (% Sky Obscured)

34
25
29
25
25
23
13
13
0
43
55
82
94
29
57
32
38
44
32
18
53
55
100
95

High Clouds (% Sky Obscured)

100
100
100
88
100
42
87
91
100
100
100
100
100
36
35
28
95
86
90
94
100
100
100
79

ISS Passover

Visibility (miles)

-
-
-
-
-
-
-
-
-
-
-
-
-
9
9
9
9
9
9
9
9
9
9
9

Fog (%)

-
-
-
-
-
-
-
-
-
-
-
-
-
0
0
0
0
0
0
0
0
0
0
0

Precipitation Type

None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None

Precipitation Probability (%)

0
0
0
0
0
0
0
0
0
0
0
0
0
2
0
0
0
0
0
0
0
0
0
1

Precipitation Amount (mm)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

5
5
7
9
9
9
10
10
9
7
6
7
4
7
7
7
8
9
9
9
11
12
13
13

Chance of Frost

Temperature (°C)

25
26
26
27
26
26
25
24
22
20
19
18
16
18
17
15
13
13
14
15
16
17
19
20

Feels Like (°C)

26
27
27
27
27
27
26
24
22
21
20
19
15
17
16
13
13
11
11
12
13
14
16
16

Dew Point (°C)

14
14
13
14
14
14
14
14
13
13
11
11
11
15
15
13
12
11
11
10
11
12
12
11

Relative Humidity (%)

49
46
44
43
45
46
50
56
56
60
60
61
71
83
89
86
90
89
80
73
72
68
64
58

Pressure (mb)

1020
1019
1018
1017
1017
1016
1016
1016
1016
1016
1016
1016
1015
1015
1015
1014
1015
1015
1015
1015
1015
1016
1015
1015

Ozone (du)

336
336
337
337
336
339
340
337
337
341
342
346
350
352
360
357
349
346
345
346
348
349
350
350

Monday 1

Waning Gibbous 99%

22:06

04:43

12 Bad
13 Bad
14 Bad
15 Bad
16 Bad
17 Bad
18 Bad
19 Bad
20 Bad
21 Bad
22 Bad
23 Bad
00 OK
01 OK
02 Bad
03 Bad
04 Bad
05 Bad
06 Bad
07 Bad
08 Bad
09 Bad
10 Bad
11 Bad

Sun - Rise: 04:45, Set: 21:07, Transit: 12:57. Moon - Rise: 22:06, Set: 04:43. Civil Dark: 21:53 - 03:59. Nautical Dark: 23:02 - 02:50. Astro Dark: N/A - N/A

Total Clouds (% Sky Obscured)

100
98
94
89
96
76
52
50
75
78
49
48
39
41
86
95
55
99
72
100
100
100
100
100

Low Clouds (% Sky Obscured)

32
38
18
35
8
18
19
0
54
37
43
12
34
37
54
36
30
29
4
0
0
0
13
48

Medium Clouds (% Sky Obscured)

100
93
83
32
44
26
16
13
11
20
10
13
11
9
1
0
0
2
22
27
30
55
76
97

High Clouds (% Sky Obscured)

94
82
5
77
3
0
0
0
0
0
0
0
0
0
67
92
31
97
44
100
100
100
100
100

ISS Passover

Visibility (miles)

9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9

Fog (%)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Precipitation Type

None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None

Precipitation Probability (%)

0
1
3
3
5
15
17
15
4
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Precipitation Amount (mm)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

13
13
14
14
13
12
12
11
10
8
8
8
7
7
6
6
5
5
5
6
7
8
9
9

Chance of Frost

Temperature (°C)

20
21
21
22
22
21
21
21
19
18
17
16
15
13
13
12
12
11
12
13
14
16
17
18

Feels Like (°C)

16
17
18
17
18
18
19
20
19
18
17
16
15
14
13
12
11
11
10
12
13
14
15
15

Dew Point (°C)

11
11
11
12
14
14
13
14
15
15
15
15
14
13
12
11
11
10
10
11
10
10
9
9

Relative Humidity (%)

57
53
52
53
60
63
60
67
76
83
89
92
95
96
96
95
95
95
92
86
75
65
59
54

Pressure (mb)

1015
1015
1015
1015
1015
1015
1015
1015
1016
1016
1016
1017
1017
1017
1017
1017
1017
1017
1017
1017
1017
1016
1016
1016

Ozone (du)

352
353
354
355
359
364
359
353
349
346
343
342
342
341
339
339
339
339
336
336
335
334
334
334

Tuesday 2

Waning Gibbous 97%

23:01

05:34

12 Bad
13 Bad
14 Bad
15 Bad
16 Bad
17 Bad
18 Bad
19 Bad
20 Bad
21 Bad
22 Bad
23 Bad
00 Bad
01 Bad
02 Bad
03 Bad
04 Bad
05 Bad
06 Bad
07 Bad
08 Bad
09 Bad
10 Bad
11 Bad

Sun - Rise: 04:45, Set: 21:08, Transit: 12:57. Moon - Rise: 23:01, Set: 05:34. Civil Dark: 21:55 - 03:58. Nautical Dark: 23:04 - 02:49. Astro Dark: N/A - N/A

Total Clouds (% Sky Obscured)

100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
89
100
100
89

Low Clouds (% Sky Obscured)

62
63
47
63
45
50
50
73
66
81
84
75
80
86
71
73
79
81
75
67
66
75
76
65

Medium Clouds (% Sky Obscured)

100
51
79
100
100
100
100
89
96
98
100
100
100
100
100
88
69
57
28
62
71
35
4
3

High Clouds (% Sky Obscured)

100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
99
100
100
99
46
100
97
60

ISS Passover

Visibility (miles)

9
9
9
9
9
9
9
9
9
9
9
7
9
7
4
9
8
9
9
7
9
9
4
9

Fog (%)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Precipitation Type

None
None
None
None
None
None
None
None
Very Light Rain
Very Light Rain
Light Rain
Light Rain
None
Light Rain
Light Rain
Light Rain
Light Rain
None
None
None
None
Light Rain
Very Light Rain
Very Light Rain

Precipitation Probability (%)

0
0
5
40
35
29
20
52
70
75
95
95
68
95
95
95
80
37
61
31
41
77
70
65

Precipitation Amount (mm)

0
0
0
0
0
0
0
0
0.2
0.3
0.5
1.2
0
0.6
0.7
0.6
0.7
0
0
0
0
0.6
0.3
0.2

Wind Speed/Direction (mph)

10
10
12
13
13
9
10
10
12
10
10
11
10
10
10
10
10
8
9
9
8
9
11
10

Chance of Frost

Temperature (°C)

19
20
21
21
19
18
18
17
16
15
15
14
14
14
15
15
15
15
15
15
16
16
17
17

Feels Like (°C)

16
18
18
17
17
17
15
14
13
13
12
12
12
12
12
13
13
13
13
13
15
15
15
15

Dew Point (°C)

9
10
9
11
15
14
12
10
13
14
14
14
14
14
14
14
14
14
14
14
15
14
14
15

Relative Humidity (%)

52
50
48
52
76
75
68
65
83
93
96
96
98
98
96
96
96
96
95
95
96
86
83
85

Pressure (mb)

1015
1014
1013
1013
1013
1012
1012
1011
1011
1010
1010
1009
1008
1008
1007
1006
1006
1005
1005
1005
1005
1005
1005
1005

Ozone (du)

334
334
335
334
335
336
338
339
341
342
345
346
352
353
355
363
365
368
372
375
381
385
388
391

Wednesday 3

Waning Gibbous 93%

23:43

06:37

12 Bad
13 Bad
14 Bad
15 Bad
16 Bad
17 Bad
18 Bad
19 Bad
20 Bad
21 Bad
22 Bad
23 OK
00 OK
01 OK
02 OK
03 OK
04 OK
05 Bad
06 Bad
07 Bad
08 Bad
09 Bad
10 Bad
11 Bad

Sun - Rise: 04:44, Set: 21:10, Transit: 12:57. Moon - Rise: 23:43, Set: 06:37. Civil Dark: 21:56 - 03:57. Nautical Dark: 23:06 - 02:47. Astro Dark: N/A - N/A

Total Clouds (% Sky Obscured)

80
77
54
83
83
71
70
57
46
32
32
32
32
26
21
17
20
71
77
78
88
98
98
98

Low Clouds (% Sky Obscured)

68
77
54
48
55
34
32
31
30
29
27
26
28
26
21
17
20
29
32
43
57
55
48
63

Medium Clouds (% Sky Obscured)

2
1
0
9
19
26
50
38
26
14
15
15
18
12
7
0
0
0
0
19
35
39
61
25

High Clouds (% Sky Obscured)

55
62
13
63
70
51
50
38
21
0
0
0
0
0
0
1
1
20
20
34
60
83
81
81

ISS Passover

Visibility (miles)

9
6
4
5
6
5
5
3
4
9
9
9
9
9
9
9
9
9
9
8
7
9
9
9

Fog (%)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Precipitation Type

Very Light Rain
Light Rain
Light Rain
Light Rain
Very Light Rain
Light Rain
Light Rain
Light Rain
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None

Precipitation Probability (%)

72
86
90
78
67
74
70
58
44
27
19
10
0
0
0
0
0
0
0
0
0
0
0
0

Precipitation Amount (mm)

0.3
0.5
0.6
0.4
0.3
0.4
0.4
0.4
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

11
11
12
12
12
11
11
10
8
8
7
7
8
8
7
7
7
7
7
9
10
10
12
13

Chance of Frost

Temperature (°C)

18
19
19
19
19
19
18
17
16
15
14
13
13
12
12
11
11
11
12
13
14
15
16
18

Feels Like (°C)

16
18
18
17
17
17
17
17
17
15
14
13
12
12
12
11
10
11
10
11
12
12
13
13

Dew Point (°C)

13
13
12
12
12
13
13
14
14
13
13
12
12
12
11
10
10
11
11
12
12
12
11
10

Relative Humidity (%)

72
66
62
63
65
68
72
81
86
90
95
95
96
96
95
95
96
98
96
95
92
84
72
60

Pressure (mb)

1005
1004
1004
1004
1004
1005
1005
1005
1006
1007
1007
1008
1008
1009
1009
1009
1009
1009
1009
1009
1009
1009
1009
1008

Ozone (du)

389
389
392
395
396
396
395
396
396
396
395
387
384
377
371
367
362
359
355
353
351
349
349
349

Thursday 4

Waning Gibbous 88%

00:14

07:48

12 Bad
13 Bad
14 Bad
15 Bad
16 Bad
17 Bad
18 Bad
19 Bad
20 Bad
21 Bad
22 Bad
23 Bad
00 Bad
01 Bad
02 Bad
03 Bad
04 Bad
05 Bad
06 Bad
07 Bad
08 Bad
09 Bad
10 Bad
11 Bad

Sun - Rise: 04:43, Set: 21:11, Transit: 12:57. Moon - Rise: 00:14, Set: 07:48. Civil Dark: 21:57 - 03:57. Nautical Dark: 23:07 - 02:46. Astro Dark: N/A - N/A

Total Clouds (% Sky Obscured)

98
98
98
98
99
99
100
100
90
69
50
57
50
71
81
84
85
85
85
85
85
82
79
72

Low Clouds (% Sky Obscured)

59
66
73
77
85
92
100
100
90
69
50
57
42
55
58
58
56
55
53
54
55
55
50
45

Medium Clouds (% Sky Obscured)

87
74
90
91
94
97
90
38
30
23
16
22
21
27
32
33
35
36
38
35
29
26
17
12

High Clouds (% Sky Obscured)

77
71
67
62
73
76
96
53
30
0
0
0
1
0
0
0
0
0
0
1
0
0
0
0

ISS Passover

Visibility (miles)

9
9
9
9
9
4
2
9
9
6
7
9
9
9
9
9
9
9
9
9
9
9
9
9

Fog (%)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Precipitation Type

None
None
Very Light Rain
Very Light Rain
None
None
Very Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
None
None
None
None
None
None
None
None
None
None
None
None
None

Precipitation Probability (%)

0
15
55
48
47
61
79
95
95
95
81
53
10
9
6
7
2
1
1
12
13
16
18
19

Precipitation Amount (mm)

0
0
0.3
0.2
0
0
0.3
0.5
0.7
0.7
0.4
0
0
0
0
0
0
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

14
17
18
16
17
16
16
15
15
14
13
11
11
11
11
11
11
11
11
12
13
15
15
16

Chance of Frost

Temperature (°C)

18
19
19
17
16
16
15
15
15
15
14
14
14
13
13
13
13
12
13
13
14
14
15
16

Feels Like (°C)

14
14
13
13
13
12
12
12
12
11
12
13
12
12
10
10
9
9
9
9
10
10
11
10

Dew Point (°C)

11
12
12
16
16
15
15
15
14
13
13
13
13
13
12
12
12
11
11
11
11
8
7
7

Relative Humidity (%)

63
63
66
92
96
96
98
96
93
90
93
93
92
95
95
95
93
93
90
90
82
66
57
56

Pressure (mb)

1008
1007
1007
1006
1006
1005
1004
1003
1002
1002
1001
1001
1001
1001
1001
1001
1001
1001
1002
1002
1002
1002
1003
1003

Ozone (du)

352
354
355
360
363
372
380
387
393
396
399
401
402
401
400
401
396
393
394
395
392
393
393
390

Friday 5

Waning Gibbous 81%

00:37

09:02

12 Bad
13 Bad
14 Bad
15 Bad
16 Bad
17 Bad
18 Bad
19 Bad
20 Bad
21 Bad
22 Bad
23 OK
00 OK
01 OK
02 OK
03 OK
04 Bad
05 Bad
06 Bad
07 Bad
08 Bad
09 Bad
10 Bad
11 Bad

Sun - Rise: 04:43, Set: 21:12, Transit: 12:57. Moon - Rise: 00:37, Set: 09:02. Civil Dark: 21:58 - 03:56. Nautical Dark: 23:09 - 02:44. Astro Dark: N/A - N/A

Total Clouds (% Sky Obscured)

64
77
88
99
95
93
93
88
84
77
60
40
20
22
20
17
22
26
39
50
61
70
79
87

Low Clouds (% Sky Obscured)

40
42
45
48
51
55
58
55
53
50
33
17
0
3
5
8
13
23
35
37
35
33
48
63

Medium Clouds (% Sky Obscured)

13
15
19
22
22
28
32
42
57
77
60
40
20
22
20
17
22
26
29
50
61
62
46
28

High Clouds (% Sky Obscured)

29
35
51
67
46
28
15
10
20
40
50
40
20
22
20
17
22
8
1
1
0
0
3
6

ISS Passover

Visibility (miles)

9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
7
5
3
5
6
8
6

Fog (%)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Precipitation Type

None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
Very Light Rain
Very Light Rain
None
Very Light Rain
Light Rain

Precipitation Probability (%)

7
15
14
12
14
14
12
11
11
9
9
9
9
13
16
20
38
49
55
60
61
59
66
73

Precipitation Amount (mm)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0.2
0.2
0.2
0.3
0.4

Wind Speed/Direction (mph)

16
15
16
16
16
15
13
12
11
10
9
9
8
8
7
7
6
7
8
9
10
11
13
14

Chance of Frost

Temperature (°C)

16
17
17
18
18
18
17
16
15
14
13
12
12
11
10
10
9
10
10
10
11
12
13
14

Feels Like (°C)

11
12
12
13
12
13
13
13
12
11
12
12
11
11
8
8
8
8
8
9
9
9
10
10

Dew Point (°C)

8
8
8
7
7
7
8
8
8
8
8
8
8
8
8
8
8
9
9
10
11
12
13
13

Relative Humidity (%)

57
56
53
50
46
50
54
58
61
63
68
72
77
83
84
88
90
93
96
98
96
96
96
93

Pressure (mb)

1003
1003
1003
1003
1003
1004
1004
1004
1005
1005
1006
1006
1006
1006
1006
1006
1005
1005
1005
1004
1004
1003
1002
1001

Ozone (du)

382
378
377
377
376
371
366
362
361
361
361
361
360
360
359
358
356
358
359
360
364
367
370
375

Saturday 6

Waning Gibbous 72%

00:54

10:18

12 Bad
13 Bad
14 Bad
15 Bad
16 Bad
17 Bad
18 Bad
19 Bad
20 Bad
21 Bad
22 Bad
23 Bad
00 Bad
01 Bad
02 Bad
03 Bad
04 Bad
05 Bad
06 Bad
07 Bad
08 Bad
09 Bad
10 Bad
11 Bad

Sun - Rise: 04:42, Set: 21:13, Transit: 12:58. Moon - Rise: 00:54, Set: 10:18. Civil Dark: 21:59 - 03:55. Nautical Dark: 23:11 - 02:43. Astro Dark: N/A - N/A

Total Clouds (% Sky Obscured)

96
97
98
100
96
95
94
91
87
86
81
81
84
79
77
72
71
69
70
75
83
75
72
70

Low Clouds (% Sky Obscured)

76
70
65
60
52
44
35
39
43
47
53
56
56
61
65
72
70
64
59
59
60
55
54
60

Medium Clouds (% Sky Obscured)

15
43
76
100
89
78
68
73
78
83
72
62
40
27
12
0
5
10
10
16
23
30
10
5

High Clouds (% Sky Obscured)

9
7
7
10
17
25
26
21
11
2
6
10
15
10
5
0
0
1
1
19
37
55
55
60

ISS Passover

Visibility (miles)

4
3
5
7
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9

Fog (%)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Precipitation Type

Light Rain
Light Rain
Light Rain
Moderate Rain
Light Rain
Light Rain
None
None
None
Very Light Rain
None
None
None
None
None
None
None
None
None
None
None
None
None
Very Light Rain

Precipitation Probability (%)

82
95
95
95
95
81
30
32
34
40
32
24
11
13
10
0
5
19
0
9
12
12
44
64

Precipitation Amount (mm)

0.6
1.2
1.6
2.5
1.3
0.6
0
0
0
0.2
0
0
0
0
0
0
0
0
0
0
0
0
0
0.3

Wind Speed/Direction (mph)

15
16
13
14
17
16
16
15
14
13
13
12
12
12
11
11
11
11
11
11
12
12
13
12

Chance of Frost

Temperature (°C)

14
15
14
14
13
13
13
13
13
13
12
12
12
11
11
11
11
11
12
12
13
14
15
16

Feels Like (°C)

10
10
13
12
12
13
13
14
9
9
7
8
7
8
8
8
8
8
8
8
9
10
11
10

Dew Point (°C)

13
13
12
12
13
12
12
12
12
11
10
10
10
10
10
10
10
10
10
10
9
8
8
7

Relative Humidity (%)

89
86
87
90
95
93
92
92
90
89
87
89
90
92
92
93
95
92
89
87
77
69
62
57

Pressure (mb)

1001
1000
1000
1000
1001
1003
1004
1006
1007
1008
1009
1010
1011
1011
1012
1012
1012
1013
1013
1014
1014
1014
1014
1014

Ozone (du)

380
385
395
404
414
408
402
396
397
398
398
395
391
388
383
379
374
373
371
370
368
366
364
363

Forecast for Old Harlow, Essex, United Kingdom (51.80,0.14)

Generated: 31/05/26 01:05:32. Forecast: 31/05/26 to 06/06/26. Timezone: UTC+1.00