Clear Outside v1.0 - International Weather Forecasts For Astronomers

Sunday 21

Waxing Crescent 2%

09:53

16:56

00 Bad
01 Bad
02 Bad
03 Bad
04 Bad
05 Bad
06 Bad
07 Bad
08 Bad
09 Bad
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

Sun - Rise: 08:13, Set: 16:04, Transit: 12:08. Moon - Rise: 09:53, Set: 16:56. Civil Dark: 16:44 - 07:33. Nautical Dark: 17:27 - 06:50. Astro Dark: 18:07 - 06:09

Total Clouds (% Sky Obscured)

100
100
100
98
83
82
85
91
93
97
100
100
100
100
100
100
100
100
100
100
100
100
100
98

Low Clouds (% Sky Obscured)

60
74
67
64
62
66
70
59
60
61
83
75
66
54
54
53
64
64
86
88
90
89
100
96

Medium Clouds (% Sky Obscured)

88
70
79
49
22
46
61
81
86
79
97
98
96
100
100
100
100
100
100
100
100
100
100
97

High Clouds (% Sky Obscured)

100
99
93
81
74
42
60
47
54
76
89
100
96
100
100
100
100
100
77
86
100
100
100
17

ISS Passover

Visibility (miles)

9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
3
8
9
4
9
9
7

Fog (%)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
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
Very Light Rain
Light Rain
Very Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain

Precipitation Probability (%)

23
26
44
30
22
1
1
0
2
4
7
5
12
12
17
22
61
77
68
88
85
83
92
83

Precipitation Amount (mm)

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

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

8
8
8
8
8
8
7
7
7
7
8
9
9
9
9
9
9
9
9
9
9
9
9
9

Feels Like (°C)

5
5
6
5
5
6
5
5
5
5
5
6
6
6
6
6
6
6
6
6
6
6
6
6

Dew Point (°C)

7
7
7
7
7
7
6
6
6
6
7
8
8
8
8
8
8
8
9
8
8
9
8
9

Relative Humidity (%)

93
95
95
93
93
94
93
94
94
94
93
93
93
91
90
93
91
95
96
95
95
95
93
95

Pressure (mb)

1004
1004
1004
1005
1005
1005
1005
1005
1006
1006
1007
1007
1006
1006
1006
1005
1005
1005
1005
1005
1004
1004
1004
1004

Ozone (du)

317
316
318
321
321
316
318
324
329
336
344
354
360
365
369
368
369
369
371
374
377
380
382
382

Monday 22

Waxing Crescent 6%

10:23

18:10

00 Bad
01 Bad
02 Bad
03 Bad
04 Bad
05 Bad
06 Bad
07 Bad
08 Bad
09 Bad
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

Sun - Rise: 08:14, Set: 16:04, Transit: 12:09. Moon - Rise: 10:23, Set: 18:10. Civil Dark: 16:44 - 07:33. Nautical Dark: 17:27 - 06:50. Astro Dark: 18:08 - 06:10

Total Clouds (% Sky Obscured)

100
100
100
100
98
98
99
88
87
93
100
100
98
100
75
68
69
89
100
100
100
100
100
97

Low Clouds (% Sky Obscured)

94
91
93
97
82
96
99
80
72
67
61
91
87
53
53
48
53
72
93
100
100
100
100
90

Medium Clouds (% Sky Obscured)

100
85
86
100
91
77
70
52
32
31
59
66
25
25
0
18
17
49
27
35
29
39
39
36

High Clouds (% Sky Obscured)

12
100
25
69
63
20
18
4
39
68
100
98
85
100
55
20
13
19
86
38
46
22
67
37

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

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

Precipitation Probability (%)

68
63
72
85
39
15
7
5
4
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Precipitation Amount (mm)

0.2
0.2
0.3
0.7
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
12
10
11
12
11
10
9
9
8
7
8
8
8
7
7
6
6
5
6
6
5
6
6

Chance of Frost

Temperature (°C)

10
10
10
10
10
10
10
10
9
9
9
10
10
11
11
10
9
8
8
8
7
7
7
7

Feels Like (°C)

6
7
7
6
6
7
6
7
7
6
7
7
8
8
8
8
8
7
6
7
6
6
5
5

Dew Point (°C)

9
9
9
9
9
9
8
8
8
8
8
8
8
8
8
9
8
7
7
7
7
7
7
6

Relative Humidity (%)

93
91
93
93
93
93
90
91
91
91
90
88
85
84
85
90
93
93
96
95
96
96
96
96

Pressure (mb)

1004
1004
1003
1004
1004
1004
1004
1005
1005
1006
1007
1007
1007
1007
1008
1008
1008
1009
1010
1010
1011
1012
1013
1013

Ozone (du)

381
384
385
384
384
385
384
383
381
380
381
385
387
388
388
387
386
383
382
381
379
374
368
362

Tuesday 23

Waxing Crescent 12%

10:45

19:28

00 Bad
01 Bad
02 Bad
03 Bad
04 Bad
05 Bad
06 Bad
07 Bad
08 Bad
09 Bad
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

Sun - Rise: 08:14, Set: 16:05, Transit: 12:09. Moon - Rise: 10:45, Set: 19:28. Civil Dark: 16:45 - 07:34. Nautical Dark: 17:28 - 06:51. Astro Dark: 18:09 - 06:10

Total Clouds (% Sky Obscured)

97
95
96
97
98
95
96
100
90
91
96
100
97
100
100
95
100
100
100
100
100
100
100
100

Low Clouds (% Sky Obscured)

87
85
88
80
70
69
68
76
79
83
86
99
96
100
100
94
100
100
100
100
100
100
100
100

Medium Clouds (% Sky Obscured)

22
12
9
71
81
31
19
16
7
4
4
4
0
0
0
0
5
0
0
0
0
11
26
34

High Clouds (% Sky Obscured)

69
27
36
58
88
18
37
100
90
22
39
35
6
3
43
17
37
15
13
9
4
3
4
6

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
3
33
41
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
0
0
0
0
0
0
0
0
0
0
0
0
1
0
0
0
0
0
1
1
3
4
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)

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

Chance of Frost

Temperature (°C)

7
7
7
7
7
6
6
6
6
6
6
7
7
6
7
7
7
7
7
7
6
7
6
6

Feels Like (°C)

5
4
4
5
4
4
3
3
3
3
3
3
2
2
2
3
2
2
2
1
2
2
1
2

Dew Point (°C)

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

Relative Humidity (%)

96
96
96
96
96
94
94
94
94
94
93
93
91
87
85
85
82
81
81
79
81
84
81
81

Pressure (mb)

1013
1014
1014
1015
1015
1015
1016
1017
1018
1019
1019
1019
1019
1020
1020
1020
1021
1021
1022
1022
1023
1023
1024
1024

Ozone (du)

359
359
357
356
356
357
357
352
354
355
357
354
356
352
349
347
344
340
334
331
332
333
332
333

Wednesday 24

Waxing Crescent 19%

11:01

20:46

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

Sun - Rise: 08:14, Set: 16:05, Transit: 12:10. Moon - Rise: 11:01, Set: 20:46. Civil Dark: 16:45 - 07:34. Nautical Dark: 17:28 - 06:51. Astro Dark: 18:09 - 06:10

Total Clouds (% Sky Obscured)

100
100
99
100
100
100
99
90
97
95
62
45
47
45
41
66
67
58
52
56
68
58
54
50

Low Clouds (% Sky Obscured)

98
95
93
95
98
100
95
89
88
86
62
45
47
45
41
55
39
23
35
47
59
58
54
50

Medium Clouds (% Sky Obscured)

84
86
86
70
56
12
4
2
0
0
0
0
0
0
0
21
0
0
0
2
0
0
0
0

High Clouds (% Sky Obscured)

8
10
15
10
10
15
20
32
48
32
15
2
6
3
4
10
45
45
30
9
25
13
0
0

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 (%)

3
4
4
6
6
6
6
7
7
6
4
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)

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

Chance of Frost

Temperature (°C)

6
6
6
6
6
6
6
6
5
5
5
5
6
5
5
5
4
3
3
3
2
2
2
2

Feels Like (°C)

1
1
1
1
1
1
1
1
0
-1
-1
1
2
1
1
0
-2
-2
-3
-4
-4
-4
-3
-2

Dew Point (°C)

3
4
3
3
3
3
3
3
3
2
2
2
2
2
2
1
1
0
-1
-1
-1
-2
-2
-2

Relative Humidity (%)

82
83
79
79
79
78
78
82
83
80
76
79
78
76
78
78
80
80
77
77
79
78
77
77

Pressure (mb)

1024
1025
1025
1025
1026
1026
1026
1027
1028
1029
1030
1030
1030
1031
1031
1031
1032
1032
1033
1033
1034
1034
1034
1034

Ozone (du)

332
331
329
329
327
327
328
327
327
328
330
331
331
333
333
331
331
330
328
326
328
332
336
338

Thursday 25

Waxing Crescent 28%

11:15

22:04

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

Sun - Rise: 08:15, Set: 16:06, Transit: 12:10. Moon - Rise: 11:15, Set: 22:04. Civil Dark: 16:46 - 07:35. Nautical Dark: 17:29 - 06:51. Astro Dark: 18:10 - 06:11

Total Clouds (% Sky Obscured)

48
44
38
32
25
15
13
14
12
9
6
1
1
2
1
2
7
14
16
11
3
3
3
2

Low Clouds (% Sky Obscured)

48
44
38
32
25
15
13
14
12
9
5
0
0
1
1
1
2
0
0
1
0
1
1
1

Medium Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
2
7
14
16
11
0
0
0
0

High Clouds (% Sky Obscured)

0
0
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
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
0
0
0
0
0
0
0
0
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)

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

Chance of Frost

Temperature (°C)

2
2
2
2
2
2
2
2
2
2
3
4
5
5
5
5
4
4
3
3
2
2
2
2

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

77
77
76
76
73
71
71
76
80
84
83
77
75
73
73
72
75
76
76
74
73
72
70
69

Pressure (mb)

1034
1034
1034
1033
1033
1033
1032
1032
1032
1032
1032
1031
1030
1030
1029
1029
1029
1029
1029
1029
1030
1030
1030
1029

Ozone (du)

339
339
338
338
339
338
338
339
340
342
342
345
347
351
355
359
358
357
356
355
353
352
351
351

Friday 26

Waxing Crescent 39%

11:27

23:23

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

Sun - Rise: 08:15, Set: 16:07, Transit: 12:11. Moon - Rise: 11:27, Set: 23:23. Civil Dark: 16:47 - 07:35. Nautical Dark: 17:30 - 06:52. Astro Dark: 18:11 - 06:11

Total Clouds (% Sky Obscured)

11
20
30
27
23
20
24
24
19
9
3
2
3
4
10
10
28
46
52
57
53
66
82
87

Low Clouds (% Sky Obscured)

11
19
24
24
23
20
24
24
19
9
3
2
3
4
10
10
28
46
52
57
53
66
82
87

Medium Clouds (% Sky Obscured)

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

High Clouds (% Sky Obscured)

0
0
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
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
0
0
0
0
0
0
0
0
0
0
0
1
1
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
12
12
12
12
12
12
11
11
11
11
12
13
13
13
13
13
13
12
12
12
11
12
12

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

-4
-4
-4
-4
-3
-3
-3
-2
-3
-2
-2
-2
-2
-2
-1
0
0
1
1
2
2
2
2
2

Relative Humidity (%)

68
68
70
71
74
76
77
77
74
74
72
69
66
69
72
76
79
83
86
88
89
89
91
91

Pressure (mb)

1029
1029
1029
1029
1029
1029
1029
1030
1030
1031
1031
1031
1031
1031
1031
1031
1032
1032
1033
1033
1034
1035
1035
1035

Ozone (du)

350
350
350
349
348
348
347
346
345
344
344
343
343
340
337
335
333
332
331
330
328
327
324
321

Saturday 27

First Quarter 50%

11:38

No Set

Sun - Rise: 08:15, Set: 16:08, Transit: 12:11. Moon - Rise: 11:38, Set: No Set. Civil Dark: 16:48 - 07:35. Nautical Dark: 17:31 - 06:52. Astro Dark: 18:11 - 06:11

Total Clouds (% Sky Obscured)

Low Clouds (% Sky Obscured)

Medium Clouds (% Sky Obscured)

High Clouds (% Sky Obscured)

ISS Passover

Visibility (miles)

Fog (%)

Precipitation Type

Precipitation Probability (%)

Precipitation Amount (mm)

Wind Speed/Direction (mph)

Chance of Frost

Temperature (°C)

Feels Like (°C)

Dew Point (°C)

Relative Humidity (%)

Pressure (mb)

Ozone (du)

Forecast for Bristol, Bristol, United Kingdom (51.45,-2.59)

Generated: 21/12/25 00:27:56. Forecast: 21/12/25 to 27/12/25. Timezone: UTC+0.00