Clear Outside v1.0 - International Weather Forecasts For Astronomers

Tuesday 23

Waxing Crescent 13%

10:00

19:49

10 Bad
11 Bad
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

Sun - Rise: 07:20, Set: 16:19, Transit: 11:50. Moon - Rise: 10:00, Set: 19:49. Civil Dark: 16:51 - 06:48. Nautical Dark: 17:27 - 06:12. Astro Dark: 18:02 - 05:37

Total Clouds (% Sky Obscured)

100
100
100
100
100
99
99
99
99
94
100
98
94
100
100
100
100
99
96
69
53
62
69
78

Low Clouds (% Sky Obscured)

80
88
91
96
94
92
93
93
95
90
92
95
89
100
100
100
99
83
78
52
46
62
69
69

Medium Clouds (% Sky Obscured)

100
100
100
100
99
97
97
95
94
80
84
46
59
69
46
40
52
65
61
54
25
24
28
0

High Clouds (% Sky Obscured)

100
90
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

ISS Passover

Visibility (miles)

9
9
6
2
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
6
9
8
9
8

Fog (%)

0
0
0
0
0
0
0
0
0
0
5
15
27
40
17
2
3
1
0
0
0
0
0
0

Precipitation Type

None
None
Snow
Snow
Snow
Snow
Snow
Snow
Snow
Snow
Snow
Snow
Snow
Snow
Snow
Snow
Snow
Snow
Snow
None
None
None
None
None

Precipitation Probability (%)

0
0
50
64
73
82
95
95
95
91
71
61
59
70
55
44
58
61
61
46
38
15
22
12

Precipitation Amount (mm)

0
0
0.2
0.3
0.4
0.5
0.9
1
1
0.6
0.2
0.2
0.2
0.3
0.2
0.1
0.2
0.2
0.2
0
0
0
0
0

Wind Speed/Direction (mph)

4
4
4
3
4
3
3
3
4
3
3
3
3
3
2
3
3
4
9
15
13
13
13
13

Chance of Frost

Temperature (°C)

-3
-3
-3
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-0
0
0
1
2
1
1
1

Feels Like (°C)

-6
-5
-6
-4
-4
-3
-4
-4
-4
-3
-3
-3
-4
-4
-3
-4
-3
-3
-4
-6
-3
-4
-3
-4

Dew Point (°C)

-7
-7
-6
-4
-2
-2
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
-0
-2
-2
-1
-2
-2
-3

Relative Humidity (%)

73
73
78
83
91
94
98
98
100
98
98
98
98
100
98
98
98
98
89
81
83
81
80
77

Pressure (mb)

1024
1023
1021
1020
1018
1017
1017
1016
1015
1015
1014
1013
1012
1011
1010
1010
1009
1008
1008
1008
1009
1011
1012
1014

Ozone (du)

317
312
309
308
307
306
308
313
313
314
323
328
331
333
336
337
338
340
348
353
353
351
350
345

Wednesday 24

Waxing Crescent 21%

10:24

20:58

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

Sun - Rise: 07:21, Set: 16:20, Transit: 11:50. Moon - Rise: 10:24, Set: 20:58. Civil Dark: 16:52 - 06:48. Nautical Dark: 17:28 - 06:12. Astro Dark: 18:03 - 05:38

Total Clouds (% Sky Obscured)

56
71
55
47
31
27
22
8
7
7
22
10
60
82
99
100
100
100
99
100
100
100
100
95

Low Clouds (% Sky Obscured)

48
69
52
47
28
23
19
8
5
4
6
8
8
6
70
70
74
50
74
14
21
76
28
59

Medium Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
1
2
18
2
60
82
99
100
100
100
97
100
95
78
76
63

High Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
0
0
2
3
24
100
100
100
49
88
100
100
100
71

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
1
0
0
0
0
2
6
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 (%)

8
18
2
1
1
0
0
0
0
0
0
0
0
0
0
0
0
0
3
11
32
32
9
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)

13
12
12
12
11
9
7
5
4
3
2
1
1
1
2
2
2
2
2
3
3
3
4
3

Chance of Frost

Temperature (°C)

0
0
-0
-1
-2
-2
-3
-4
-5
-5
-6
-6
-6
-7
-7
-7
-7
-6
-6
-6
-6
-6
-6
-5

Feels Like (°C)

-5
-5
-6
-6
-6
-5
-5
-6
-6
-6
-7
-8
-7
-9
-10
-10
-10
-9
-9
-9
-9
-9
-9
-8

Dew Point (°C)

-4
-5
-6
-7
-7
-7
-7
-6
-6
-7
-7
-7
-7
-9
-9
-9
-9
-9
-8
-8
-7
-7
-8
-8

Relative Humidity (%)

73
69
65
65
66
68
75
84
89
90
92
92
92
85
83
82
82
84
84
85
89
90
85
81

Pressure (mb)

1016
1017
1018
1018
1020
1021
1022
1024
1025
1025
1026
1025
1025
1024
1024
1023
1022
1021
1020
1019
1018
1016
1015
1014

Ozone (du)

338
333
328
323
323
324
328
327
329
328
328
327
326
326
326
321
320
322
328
339
353
366
377
381

Thursday 25

Waxing Crescent 30%

10:45

22:07

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

Sun - Rise: 07:21, Set: 16:20, Transit: 11:51. Moon - Rise: 10:45, Set: 22:07. Civil Dark: 16:53 - 06:49. Nautical Dark: 17:29 - 06:13. Astro Dark: 18:03 - 05:38

Total Clouds (% Sky Obscured)

77
100
98
44
55
41
58
24
47
32
19
12
16
13
10
4
0
0
2
12
19
55
92
96

Low Clouds (% Sky Obscured)

77
80
78
32
47
36
52
17
33
28
13
8
12
11
7
2
0
0
0
2
1
3
2
0

Medium Clouds (% Sky Obscured)

32
91
31
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
4
19
36
47
79

High Clouds (% Sky Obscured)

2
37
80
0
1
0
3
4
2
1
0
0
0
0
0
2
0
0
2
8
9
33
74
53

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
1
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
5
9
18
7
4
2
1
1
2
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)

2
6
7
9
11
10
13
14
14
14
14
14
14
13
12
11
10
8
7
7
5
4
4
5

Chance of Frost

Temperature (°C)

-3
-1
-1
1
1
0
-1
-3
-4
-6
-7
-8
-9
-10
-11
-11
-12
-12
-12
-13
-13
-13
-13
-12

Feels Like (°C)

-6
-5
-5
-4
-3
-4
-5
-8
-9
-11
-12
-13
-14
-15
-16
-15
-16
-15
-16
-16
-16
-16
-16
-17

Dew Point (°C)

-6
-6
-7
-5
-4
-4
-5
-8
-10
-11
-12
-13
-15
-16
-17
-17
-18
-18
-18
-18
-19
-19
-19
-20

Relative Humidity (%)

75
68
61
65
70
74
72
69
66
67
66
65
62
62
61
61
61
62
62
62
61
61
57
51

Pressure (mb)

1014
1012
1010
1010
1010
1011
1012
1014
1016
1017
1018
1018
1019
1020
1020
1021
1022
1022
1023
1024
1025
1026
1026
1027

Ozone (du)

383
389
389
387
381
376
375
374
372
368
362
356
351
348
344
342
342
340
338
335
334
330
331
333

Friday 26

Waxing Crescent 41%

11:05

23:17

10 Bad
11 Bad
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

Sun - Rise: 07:21, Set: 16:21, Transit: 11:51. Moon - Rise: 11:05, Set: 23:17. Civil Dark: 16:53 - 06:49. Nautical Dark: 17:29 - 06:13. Astro Dark: 18:04 - 05:38

Total Clouds (% Sky Obscured)

97
99
100
100
85
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
99
97
95
93

Low Clouds (% Sky Obscured)

0
0
0
0
0
2
4
8
50
62
98
70
100
100
100
99
98
96
98
99
95
91
87
87

Medium Clouds (% Sky Obscured)

93
98
88
56
24
96
100
92
100
100
100
100
100
100
100
100
100
100
98
97
86
85
79
74

High Clouds (% Sky Obscured)

66
83
95
97
83
100
100
100
100
100
100
100
100
100
100
68
37
0
1
2
4
2
1
0

ISS Passover

Visibility (miles)

9
9
9
9
9
9
9
9
9
9
9
8
9
2
4
2
0
0
0
0
1
2
4
8

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
Snow
Snow
Snow
Snow
Snow
Snow
Snow
Snow
Snow
Snow
Snow
Snow
Snow
Snow

Precipitation Probability (%)

0
0
0
0
0
0
0
2
5
38
59
69
78
77
68
81
82
86
70
57
58
56
50
41

Precipitation Amount (mm)

0
0
0
0
0
0
0
0
0
0
0.2
0.3
0.4
0.4
0.3
0.6
0.5
0.6
0.4
0.2
0.2
0.2
0.2
0.1

Wind Speed/Direction (mph)

7
7
7
6
6
5
4
3
1
2
2
2
3
3
3
3
3
2
2
2
2
2
2
3

Chance of Frost

Temperature (°C)

-12
-11
-10
-10
-10
-10
-10
-10
-10
-10
-10
-10
-10
-10
-10
-10
-10
-10
-10
-10
-10
-11
-10
-9

Feels Like (°C)

-17
-16
-15
-14
-14
-14
-14
-14
-13
-13
-13
-14
-14
-14
-14
-14
-13
-13
-13
-13
-13
-14
-13
-12

Dew Point (°C)

-21
-21
-22
-21
-21
-20
-19
-19
-18
-18
-18
-18
-17
-15
-13
-13
-12
-12
-12
-12
-12
-12
-12
-12

Relative Humidity (%)

47
42
39
38
38
40
45
48
49
48
51
52
55
62
75
77
86
86
86
86
85
90
88
80

Pressure (mb)

1027
1025
1024
1023
1023
1023
1022
1022
1023
1022
1022
1022
1022
1022
1021
1021
1022
1021
1021
1021
1022
1022
1023
1024

Ozone (du)

332
327
323
324
322
321
323
324
323
322
323
324
326
329
330
332
333
335
332
334
336
338
346
351

Saturday 27

First Quarter 52%

11:25

00:29

10 Bad
11 Bad
12 Bad
13 Bad
14 OK
15 OK
16 OK
17 Good
18 Good
19 OK
20 OK
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

Sun - Rise: 07:22, Set: 16:22, Transit: 11:52. Moon - Rise: 11:25, Set: 00:29. Civil Dark: 16:54 - 06:49. Nautical Dark: 17:30 - 06:13. Astro Dark: 18:05 - 05:39

Total Clouds (% Sky Obscured)

85
78
71
52
41
25
24
5
4
20
36
50
54
55
83
99
99
98
99
99
100
100
100
100

Low Clouds (% Sky Obscured)

83
77
70
52
31
1
1
1
2
19
36
50
54
55
56
42
37
30
53
77
100
94
84
79

Medium Clouds (% Sky Obscured)

49
25
0
0
0
2
10
1
0
2
1
0
0
0
0
0
0
1
12
30
45
61
77
97

High Clouds (% Sky Obscured)

0
0
0
0
5
5
3
1
1
1
1
1
2
3
60
98
97
96
97
99
100
100
100
100

ISS Passover

Visibility (miles)

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

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 (%)

35
25
10
9
6
0
0
0
0
1
2
2
0
0
0
0
0
0
0
0
0
2
6
13

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)

3
2
2
2
2
2
1
1
2
2
2
2
2
2
2
2
2
2
2
2
2
2
3
4

Chance of Frost

Temperature (°C)

-9
-8
-7
-5
-5
-6
-6
-8
-9
-10
-11
-11
-11
-12
-12
-12
-10
-10
-10
-10
-10
-9
-8
-7

Feels Like (°C)

-11
-11
-10
-8
-8
-9
-9
-10
-10
-11
-11
-12
-13
-13
-14
-16
-14
-14
-13
-14
-13
-13
-12
-11

Dew Point (°C)

-13
-13
-12
-11
-11
-11
-9
-9
-10
-11
-12
-12
-12
-13
-13
-13
-12
-11
-11
-11
-11
-11
-10
-9

Relative Humidity (%)

71
67
64
62
62
66
79
88
88
92
92
92
92
92
92
90
90
92
90
88
88
88
83
82

Pressure (mb)

1024
1024
1023
1023
1023
1023
1024
1024
1025
1025
1025
1025
1026
1025
1025
1025
1023
1023
1022
1022
1021
1020
1019
1018

Ozone (du)

351
352
355
357
362
364
359
352
352
350
349
346
344
344
341
341
340
340
339
341
342
344
345
347

Sunday 28

Waxing Gibbous 63%

11:46

01:45

10 Bad
11 Bad
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 OK
07 OK
08 OK
09 OK

Sun - Rise: 07:22, Set: 16:22, Transit: 11:52. Moon - Rise: 11:46, Set: 01:45. Civil Dark: 16:55 - 06:49. Nautical Dark: 17:31 - 06:13. Astro Dark: 18:05 - 05:39

Total Clouds (% Sky Obscured)

100
100
100
100
100
100
100
100
100
100
100
100
98
97
96
87
76
67
48
27
7
13
20
27

Low Clouds (% Sky Obscured)

86
93
100
96
93
89
93
96
100
97
94
92
93
93
93
87
76
67
48
27
7
13
20
27

Medium Clouds (% Sky Obscured)

98
99
100
100
100
100
100
100
100
87
75
62
42
21
0
0
0
0
0
0
0
1
2
4

High Clouds (% Sky Obscured)

100
100
100
100
100
100
100
100
100
91
70
51
42
60
25
37
23
0
0
0
0
0
0
0

ISS Passover

Visibility (miles)

1
1
0
0
0
0
0
2
3
4
3
2
1
4
7
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

Snow
Snow
Snow
Snow
Frozen rai
Frozen rai
Frozen rai
Frozen rai
Frozen rai
Sleet
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
None
None
None
None
None
None
None

Precipitation Probability (%)

61
87
95
95
95
95
95
95
68
76
82
77
88
95
95
95
91
61
57
52
36
34
26
6

Precipitation Amount (mm)

0.3
0.6
0.8
0.9
0.8
0.6
0.7
0.7
0.2
0.4
0.5
0.4
0.4
0.6
0.7
0.6
0.6
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

6
6
7
8
7
7
7
7
7
7
7
7
7
8
10
11
10
10
10
11
13
14
14
13

Chance of Frost

Temperature (°C)

-6
-6
-5
-5
-5
-4
-4
-3
-2
-2
-1
1
1
1
0
0
1
-1
-1
-2
-3
-4
-4
-4

Feels Like (°C)

-11
-11
-10
-10
-9
-8
-8
-8
-7
-6
-4
-4
-4
-3
-3
-2
-3
-4
-4
-5
-6
-6
-9
-9

Dew Point (°C)

-9
-8
-7
-6
-6
-5
-4
-4
-3
-2
-1
0
1
-0
-2
-3
-3
-5
-6
-8
-9
-10
-9
-9

Relative Humidity (%)

79
84
89
92
92
94
94
94
96
96
98
96
96
91
84
78
75
71
67
65
65
64
65
65

Pressure (mb)

1017
1015
1013
1011
1010
1009
1007
1006
1004
1003
1001
999
998
996
994
993
992
992
992
992
993
994
994
995

Ozone (du)

348
347
346
345
344
344
344
347
350
354
357
361
364
381
397
413
419
426
432
429
427
424
426
428

Monday 29

Waxing Gibbous 74%

12:11

03:04

10 Bad
11 Bad
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 OK

Sun - Rise: 07:22, Set: 16:23, Transit: 11:52. Moon - Rise: 12:11, Set: 03:04. Civil Dark: 16:56 - 06:50. Nautical Dark: 17:31 - 06:14. Astro Dark: 18:06 - 05:39

Total Clouds (% Sky Obscured)

43
63
85
82
78
71
77
82
87
92
96
100
97
93
89
85
81
77
62
47
32

Low Clouds (% Sky Obscured)

39
58
80
73
67
59
66
73
79
76
72
70
59
48
37
28
19
11
15
20
24

Medium Clouds (% Sky Obscured)

15
23
33
30
28
26
24
20
17
45
72
100
94
89
83
72
61
50
34
18
2

High Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
0
0
5
15
47
63
59
56
38
21
3

ISS Passover

Visibility (miles)

8
6
4
3
3
4
4
6
8
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

Precipitation Type

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

Precipitation Probability (%)

19
24
29
33
33
27
30
28
24
24
22
14
15
12
2
5
5
1
4
6
4

Precipitation Amount (mm)

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)

12
13
14
15
15
14
13
12
12
12
12
13
13
13
13
13
13
13
13
12
12

Chance of Frost

Temperature (°C)

-4
-4
-4
-4
-5
-6
-7
-7
-8
-9
-9
-10
-10
-10
-10
-10
-11
-10
-10
-10
-10

Feels Like (°C)

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

Dew Point (°C)

-9
-9
-9
-8
-9
-10
-10
-11
-12
-13
-14
-14
-14
-15
-15
-15
-15
-15
-15
-14
-14

Relative Humidity (%)

66
68
72
73
74
76
76
74
72
71
69
69
71
69
69
69
69
70
70
72
71

Pressure (mb)

995
995
994
994
994
994
994
995
996
997
997
998
998
998
999
999
1000
1000
1000
1001
1002

Ozone (du)

430
426
423
420
423
426
429
423
416
410
404
399
393
396
400
403
402
401
400
403
407

Forecast for Chester, Windsor, United States of America (43.26,-72.60)

Generated: 23/12/25 10:08:45. Forecast: 23/12/25 to 29/12/25. Timezone: UTC-5.00