Clear Outside v1.0 - International Weather Forecasts For Astronomers

Tuesday 23

Waxing Crescent 12%

10:53

19:16

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 OK
09 Bad
10 Bad
11 Bad
12 Bad
13 Bad

Sun - Rise: 08:07, Set: 15:53, Transit: 12:00. Moon - Rise: 10:53, Set: 19:16. Civil Dark: 16:34 - 07:26. Nautical Dark: 17:17 - 06:43. Astro Dark: 17:58 - 06:01

Total Clouds (% Sky Obscured)

100
100
100
100
98
98
100
100
100
91
94
100
95
80
84
81
61
66
43
56
49
51
51
77

Low Clouds (% Sky Obscured)

100
100
100
100
98
98
100
100
100
90
94
100
95
78
84
81
61
66
43
56
49
51
51
77

Medium Clouds (% Sky Obscured)

51
24
2
2
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

High Clouds (% Sky Obscured)

9
3
3
3
3
4
4
4
5
24
2
3
37
29
8
4
3
2
0
0
0
2
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
1
6
12
14
18
16
6
4
6
6
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)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

82
81
82
80
79
79
79
76
78
78
76
73
83
85
82
80
79
77
74
74
73
72
70
68

Pressure (mb)

1019
1020
1021
1021
1022
1023
1024
1025
1026
1026
1027
1027
1028
1029
1029
1030
1031
1032
1033
1034
1034
1034
1034
1034

Ozone (du)

355
350
349
351
356
358
356
352
352
350
347
342
340
339
337
336
337
335
340
341
342
343
348
349

Wednesday 24

Waxing Crescent 19%

11:06

20:35

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

Sun - Rise: 08:07, Set: 15:54, Transit: 12:01. Moon - Rise: 11:06, Set: 20:35. Civil Dark: 16:35 - 07:26. Nautical Dark: 17:18 - 06:43. Astro Dark: 17:59 - 06:02

Total Clouds (% Sky Obscured)

82
80
78
64
63
57
53
60
51
72
76
43
37
31
0
0
0
0
0
0
10
33
40
42

Low Clouds (% Sky Obscured)

82
80
78
64
63
57
53
60
51
72
76
43
37
31
0
0
0
0
0
0
10
33
40
42

Medium 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

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)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

69
73
76
77
77
77
79
79
77
76
74
73
69
64
62
59
57
57
56
57
56
54
53
54

Pressure (mb)

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

Ozone (du)

349
348
345
343
343
344
347
347
347
347
347
349
351
348
346
346
347
348
349
350
351
351
349
347

Thursday 25

Waxing Crescent 28%

11:17

21:53

14 OK
15 OK
16 Good
17 Good
18 Good
19 OK
20 OK
21 OK
22 OK
23 OK
00 OK
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

Sun - Rise: 08:07, Set: 15:55, Transit: 12:01. Moon - Rise: 11:17, Set: 21:53. Civil Dark: 16:35 - 07:27. Nautical Dark: 17:19 - 06:43. Astro Dark: 18:00 - 06:02

Total Clouds (% Sky Obscured)

37
35
3
0
0
31
38
38
31
24
34
49
49
51
53
56
53
56
55
57
56
60
68
70

Low Clouds (% Sky Obscured)

37
35
3
0
0
31
38
38
31
24
34
49
49
51
53
56
53
56
55
57
56
60
68
70

Medium 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

High Clouds (% Sky Obscured)

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

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)

18
16
15
15
15
15
13
12
12
12
11
12
11
11
11
11
11
11
11
11
11
11
11
12

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

55
57
59
61
63
62
65
67
69
70
70
71
71
71
71
73
73
73
74
73
70
68
69
72

Pressure (mb)

1029
1029
1029
1029
1029
1030
1030
1030
1030
1030
1030
1030
1030
1030
1029
1029
1030
1030
1030
1030
1031
1031
1030
1030

Ozone (du)

347
342
337
334
336
335
333
332
332
333
335
335
334
333
332
331
327
324
321
319
317
315
314
311

Friday 26

Waxing Crescent 39%

11:28

23:12

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 OK
12 Bad
13 Bad

Sun - Rise: 08:07, Set: 15:55, Transit: 12:02. Moon - Rise: 11:28, Set: 23:12. Civil Dark: 16:36 - 07:27. Nautical Dark: 17:19 - 06:43. Astro Dark: 18:00 - 06:02

Total Clouds (% Sky Obscured)

67
68
73
72
72
64
60
60
59
52
56
69
89
87
86
81
61
59
57
56
57
25
56
70

Low Clouds (% Sky Obscured)

64
60
57
60
64
62
60
60
59
52
56
69
79
78
77
76
61
59
57
56
54
25
54
68

Medium Clouds (% Sky Obscured)

0
0
0
0
2
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

High Clouds (% Sky Obscured)

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

ISS Passover

Visibility (miles)

9
9
9
9
9
9
9
9
9
9
8
6
0
0
2
4
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
11
10
10
10
10
9
9
8
8
8
8
8
9
9
9
8
7
8
8
10
11
12
13

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

0
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
3
4
4

Relative Humidity (%)

76
83
91
93
94
96
94
96
96
96
96
98
98
98
96
96
96
98
96
94
88
85
90
86

Pressure (mb)

1030
1030
1031
1031
1031
1032
1032
1033
1033
1033
1033
1034
1034
1034
1034
1034
1034
1035
1035
1036
1036
1036
1036
1036

Ozone (du)

309
309
308
307
307
307
307
307
306
305
305
305
304
303
303
302
301
301
299
299
298
297
296
296

Saturday 27

First Quarter 50%

11:40

00:33

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
12 Bad
13 Bad

Sun - Rise: 08:07, Set: 15:56, Transit: 12:02. Moon - Rise: 11:40, Set: 00:33. Civil Dark: 16:37 - 07:27. Nautical Dark: 17:20 - 06:44. Astro Dark: 18:01 - 06:03

Total Clouds (% Sky Obscured)

83
85
71
66
78
84
87
87
87
92
87
82
77
75
72
70
79
71
63
66
72
79
78
77

Low Clouds (% Sky Obscured)

83
85
71
66
78
84
86
87
87
92
87
82
77
74
71
68
69
64
60
66
72
79
74
69

Medium 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

High Clouds (% Sky Obscured)

1
1
1
1
0
0
0
0
0
0
0
0
0
0
1
1
3
4
4
2
1
1
11
22

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
1
1
1
1
1
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)

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

Chance of Frost

Temperature (°C)

6
6
6
5
5
5
5
5
5
5
5
5
4
4
5
5
4
4
4
4
4
5
6
6

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

84
84
79
85
93
91
91
90
90
91
93
93
94
93
85
79
76
83
88
93
88
85
82
82

Pressure (mb)

1036
1036
1036
1036
1036
1037
1037
1037
1037
1037
1037
1036
1036
1036
1036
1036
1036
1035
1035
1036
1035
1035
1035
1035

Ozone (du)

297
297
299
300
301
301
301
301
301
298
296
297
299
301
301
300
299
299
299
299
298
298
298
297

Sunday 28

Waxing Gibbous 61%

11:55

01:58

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

Sun - Rise: 08:07, Set: 15:57, Transit: 12:03. Moon - Rise: 11:55, Set: 01:58. Civil Dark: 16:38 - 07:27. Nautical Dark: 17:21 - 06:44. Astro Dark: 18:02 - 06:03

Total Clouds (% Sky Obscured)

77
80
83
84
66
46
29
25
23
21
17
11
6
24
40
60
70
75
79
70
62
57
53
49

Low Clouds (% Sky Obscured)

63
71
75
76
58
43
25
24
22
21
16
10
5
24
40
60
70
75
79
66
62
57
53
49

Medium 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

High Clouds (% Sky Obscured)

32
21
9
0
0
0
0
0
0
0
0
1
1
2
2
2
1
1
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)

10
10
10
9
9
8
7
7
6
6
6
6
6
6
6
6
6
7
7
7
8
8
9
9

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

83
83
86
88
91
91
94
96
94
94
96
94
93
93
91
89
88
84
83
81
80
79
78
80

Pressure (mb)

1034
1034
1034
1034
1034
1034
1035
1035
1035
1035
1034
1034
1034
1034
1034
1034
1033
1034
1034
1034
1033
1033
1033
1033

Ozone (du)

297
296
296
295
295
295
294
293
294
294
294
296
297
298
298
299
299
299
299
298
297
295
293
293

Monday 29

Waxing Gibbous 72%

12:14

03:27

14 OK
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 OK
06 OK
07 OK
08 OK
09 OK
10 OK
11 OK

Sun - Rise: 08:07, Set: 15:58, Transit: 12:03. Moon - Rise: 12:14, Set: 03:27. Civil Dark: 16:38 - 07:27. Nautical Dark: 17:22 - 06:44. Astro Dark: 18:03 - 06:03

Total Clouds (% Sky Obscured)

48
51
54
57
60
74
81
78
75
72
67
60
63
55
43
31
28
28
33
35
38
44

Low Clouds (% Sky Obscured)

48
51
54
57
60
74
81
78
75
72
67
60
56
52
43
31
28
25
23
20
22
24

Medium 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

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

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

Fog (%)

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

Precipitation Probability (%)

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

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

5
5
4
4
3
3
2
2
2
2
2
2
2
2
2
1
1
1
0
0
1
2

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

83
85
88
91
94
93
91
91
89
89
89
89
91
89
91
91
92
91
91
91
84
80

Pressure (mb)

1032
1032
1032
1032
1033
1033
1033
1033
1033
1033
1033
1033
1033
1033
1033
1033
1033
1033
1033
1033
1033
1033

Ozone (du)

293
292
291
290
289
288
288
287
284
281
278
280
281
282
288
294
300
307
315
322
324
326

Forecast for Welwyn Garden City, Hertfordshire, United Kingdom (51.80,-0.21)

Generated: 23/12/25 14:12:31. Forecast: 23/12/25 to 29/12/25. Timezone: UTC+0.00