Clear Outside v1.0 - International Weather Forecasts For Astronomers

Friday 19

Waning Crescent 1%

No Rise

No Set

06 OK
07 OK
08 OK
09 OK
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

Sun - Rise: N/A, Set: N/A, Transit: 11:53. Moon - Rise: No Rise, Set: No Set. Civil Dark: N/A - N/A. Nautical Dark: 12:57 - 10:49. Astro Dark: 16:12 - 07:33

Total Clouds (% Sky Obscured)

26
21
21
34
67
87
87
97
100
100
99
99
99
94
99
100
97
97
99
100
98
98
97
85

Low Clouds (% Sky Obscured)

26
21
21
33
33
25
26
0
55
54
66
77
74
64
75
83
86
87
85
84
88
88
74
76

Medium Clouds (% Sky Obscured)

0
0
0
2
15
11
16
80
99
99
98
74
75
67
99
99
96
96
99
99
96
93
96
37

High Clouds (% Sky Obscured)

0
4
9
23
34
63
57
65
76
67
40
72
71
61
76
73
63
64
72
68
61
55
11
0

ISS Passover

Visibility (miles)

2
2
2
2
2
2
2
3
5
9
9
9
9
9
9
9
9
9
1
0
0
0
1
9

Fog (%)

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

Precipitation Type

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

Precipitation Probability (%)

0
0
0
0
0
0
0
0
0
1
1
6
7
13
17
22
29
38
42
39
36
29
25
27

Precipitation Amount (mm)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0.1
0
0
0
0
0

Wind Speed/Direction (mph)

3
3
3
3
3
3
4
4
4
4
4
4
5
5
5
5
5
5
5
4
4
5
5
5

Chance of Frost

Temperature (°C)

-9
-10
-11
-11
-11
-11
-11
-11
-10
-10
-10
-10
-9
-9
-8
-8
-8
-7
-7
-7
-6
-6
-6
-6

Feels Like (°C)

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

Dew Point (°C)

-12
-12
-14
-14
-15
-15
-15
-15
-15
-15
-15
-15
-14
-13
-12
-11
-11
-9
-9
-8
-7
-7
-7
-7

Relative Humidity (%)

83
83
80
78
75
73
72
70
69
69
69
69
69
69
72
77
82
85
89
92
94
94
94
92

Pressure (mb)

1001
1001
1001
1000
1000
1000
1000
1000
1000
999
999
999
999
999
999
999
999
999
999
999
999
999
999
999

Ozone (du)

253
252
248
243
238
236
238
239
237
236
243
249
255
261
269
276
279
282
288
302
321
336
344
347

Saturday 20

New Moon 0%

No Rise

No Set

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
00 Bad
01 Bad
02 Bad
03 Bad
04 Bad
05 Bad

Sun - Rise: N/A, Set: N/A, Transit: 11:53. Moon - Rise: No Rise, Set: No Set. Civil Dark: N/A - N/A. Nautical Dark: 12:56 - 10:50. Astro Dark: 16:12 - 07:34

Total Clouds (% Sky Obscured)

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

Low Clouds (% Sky Obscured)

65
81
75
72
69
73
77
77
82
82
84
83
83
84
84
86
85
85
71
76
75
75
71
84

Medium Clouds (% Sky Obscured)

75
98
100
100
96
100
100
100
100
100
100
100
100
100
100
100
100
100
100
99
97
100
100
100

High Clouds (% Sky Obscured)

6
31
42
60
88
98
92
93
91
88
73
71
76
72
70
65
56
63
71
76
75
79
78
63

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 (%)

1
1
1
1
1
0
0
0
0
0
1
1
1
2
1
1
1
1
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 (%)

22
18
23
22
20
22
21
21
22
21
23
24
23
22
20
20
21
22
25
26
27
29
28
25

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
5
6
6
6
6
6
7
7
7
7
6
7
7
7
7
6
6
6
6
6
6
6

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

-10
-9
-10
-9
-9
-9
-9
-9
-8
-9
-9
-9
-8
-8
-8
-9
-8
-9
-9
-9
-9
-10
-10
-10

Dew Point (°C)

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

Relative Humidity (%)

89
89
89
87
89
89
90
90
92
91
91
90
91
91
91
92
92
90
90
90
90
89
89
89

Pressure (mb)

1000
1000
1001
1001
1002
1003
1003
1004
1004
1005
1005
1006
1007
1007
1008
1008
1009
1010
1010
1011
1011
1012
1012
1012

Ozone (du)

346
342
338
334
333
332
330
329
329
329
328
327
327
327
327
327
328
328
328
328
327
327
327
327

Sunday 21

Waxing Crescent 2%

No Rise

No Set

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
00 Bad
01 Bad
02 Bad
03 Bad
04 Bad
05 Bad

Sun - Rise: N/A, Set: N/A, Transit: 11:54. Moon - Rise: No Rise, Set: No Set. Civil Dark: N/A - N/A. Nautical Dark: 12:57 - 10:51. Astro Dark: 16:13 - 07:35

Total Clouds (% Sky Obscured)

100
99
100
100
100
99
97
99
99
100
93
100
100
99
100
99
100
100
100
100
100
100
100
100

Low Clouds (% Sky Obscured)

87
85
87
88
85
84
87
95
97
100
86
100
99
99
99
74
53
59
56
70
78
82
80
93

Medium Clouds (% Sky Obscured)

97
97
95
95
96
74
29
9
22
11
0
0
0
17
64
95
100
100
100
96
92
88
87
86

High Clouds (% Sky Obscured)

67
49
26
9
5
4
2
0
0
0
0
0
3
4
68
73
65
65
65
77
88
100
89
70

ISS Passover

Visibility (miles)

9
9
9
6
7
5
4
1
1
0
0
1
0
0
0
0
1
1
3
3
7
5
5
4

Fog (%)

0
0
0
1
1
1
1
1
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1

Precipitation Type

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

Precipitation Probability (%)

25
27
24
23
29
29
32
34
36
35
30
30
37
38
28
24
5
5
6
17
26
34
52
65

Precipitation Amount (mm)

0
0
0
0
0
0
0
0
0
0
0
0
0
0.1
0
0
0
0
0
0
0
0
0.1
0.2

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

-10
-9
-10
-10
-9
-10
-10
-10
-10
-10
-10
-10
-9
-8
-8
-8
-8
-8
-9
-10
-10
-10
-10
-9

Dew Point (°C)

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

Relative Humidity (%)

89
87
87
87
89
87
87
89
92
92
90
90
92
94
92
91
91
92
90
90
89
87
87
87

Pressure (mb)

1013
1013
1013
1013
1014
1014
1014
1014
1013
1014
1013
1013
1013
1013
1013
1013
1013
1012
1012
1011
1010
1009
1008
1007

Ozone (du)

327
327
325
325
325
324
322
319
314
309
303
296
288
283
281
280
282
282
282
282
284
286
287
290

Monday 22

Waxing Crescent 6%

No Rise

No Set

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
00 Bad
01 Bad
02 Bad
03 Bad
04 Bad
05 Bad

Sun - Rise: N/A, Set: N/A, Transit: 11:54. Moon - Rise: No Rise, Set: No Set. Civil Dark: N/A - N/A. Nautical Dark: 12:58 - 10:51. Astro Dark: 16:14 - 07:35

Total Clouds (% Sky Obscured)

100
100
100
100
97
93
90
93
95
99
90
81
72
72
55
50
50
50
50
50
42
40
53
55

Low Clouds (% Sky Obscured)

100
100
99
99
95
91
87
82
75
72
64
48
32
36
40
33
35
40
40
40
33
23
30
27

Medium Clouds (% Sky Obscured)

86
58
31
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)

12
16
25
30
24
16
9
27
50
90
71
52
30
30
30
30
35
40
10
1
0
3
2
11

ISS Passover

Visibility (miles)

2
1
1
1
1
2
1
2
3
4
7
7
7
3
2
3
8
5
5
5
5
5
3
2

Fog (%)

1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1

Precipitation Type

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

Precipitation Probability (%)

71
76
73
57
60
51
30
25
19
10
9
6
5
4
5
7
6
5
10
4
4
5
9
6

Precipitation Amount (mm)

0.2
0.3
0.3
0
0.2
0.2
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

-3
-3
-2
-2
-2
-2
-2
-2
-3
-3
-3
-4
-4
-4
-3
-3
-3
-4
-4
-4
-4
-4
-4
-3

Feels Like (°C)

-8
-8
-7
-7
-6
-6
-7
-7
-7
-8
-7
-8
-8
-8
-6
-6
-6
-6
-6
-7
-6
-6
-6
-6

Dew Point (°C)

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

Relative Humidity (%)

87
91
91
89
89
89
89
89
89
89
91
91
92
91
92
92
92
92
91
90
92
92
94
94

Pressure (mb)

1007
1005
1005
1004
1004
1003
1003
1003
1003
1003
1003
1003
1003
1004
1004
1004
1004
1005
1005
1005
1005
1005
1006
1006

Ozone (du)

292
290
287
284
280
283
285
290
293
296
297
296
295
292
290
288
286
287
288
287
286
285
286
286

Tuesday 23

Waxing Crescent 11%

No Rise

No Set

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
00 Bad
01 Bad
02 Bad
03 Bad
04 Bad
05 Bad

Sun - Rise: N/A, Set: N/A, Transit: 11:55. Moon - Rise: No Rise, Set: No Set. Civil Dark: N/A - N/A. Nautical Dark: 12:59 - 10:50. Astro Dark: 16:14 - 07:35

Total Clouds (% Sky Obscured)

61
59
55
55
54
51
50
62
57
59
45
69
99
89
83
79
76
75
70
75
80
84
87
94

Low Clouds (% Sky Obscured)

27
24
24
24
24
24
24
43
54
59
45
68
69
67
72
78
76
75
70
75
80
81
81
79

Medium Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
2
3
5
5
5
5
6
7

High Clouds (% Sky Obscured)

3
19
10
10
9
8
1
1
0
8
2
18
40
20
30
40
53
64
70
68
62
59
52
43

ISS Passover

Visibility (miles)

1
2
3
6
7
9
9
9
9
9
9
8
9
9
9
9
9
9
9
9
8
7
6
6

Fog (%)

1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1

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 (%)

1
3
4
5
5
5
3
8
9
5
12
15
14
20
22
18
27
25
19
22
19
13
17
19

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)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

94
94
94
92
92
92
87
87
91
90
92
90
90
89
91
91
92
91
91
91
91
92
90
90

Pressure (mb)

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

Ozone (du)

287
288
290
291
292
293
292
292
296
301
296
293
297
298
297
297
296
294
292
290
289
289
288
287

Wednesday 24

Waxing Crescent 19%

No Rise

No Set

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
00 Bad
01 Bad
02 Bad
03 Bad
04 Bad
05 Bad

Sun - Rise: N/A, Set: N/A, Transit: 11:55. Moon - Rise: No Rise, Set: No Set. Civil Dark: N/A - N/A. Nautical Dark: 13:01 - 10:49. Astro Dark: 16:15 - 07:35

Total Clouds (% Sky Obscured)

100
96
92
88
86
85
85
89
92
96
92
88
84
86
89
92
94
96
98
98
99
99
99
99

Low Clouds (% Sky Obscured)

79
72
68
66
61
60
58
65
68
73
73
70
67
72
77
82
85
89
92
90
89
89
92
95

Medium Clouds (% Sky Obscured)

12
20
28
34
33
32
30
48
65
82
65
49
33
30
27
24
18
11
5
5
5
5
5
15

High Clouds (% Sky Obscured)

40
32
29
37
43
45
50
56
56
55
52
45
39
27
20
18
30
35
31
39
37
38
32
33

ISS Passover

Visibility (miles)

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

Fog (%)

1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1

Precipitation Type

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

Precipitation Probability (%)

10
30
46
54
49
44
28
31
34
36
36
33
28
25
23
19
20
20
20
31
40
55
65
77

Precipitation Amount (mm)

0
0
0.2
0.2
0.2
0.1
0
0
0
0
0.1
0
0
0
0
0
0
0
0
0
0
0.1
0.2
0.4

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

-5
-5
-6
-6
-5
-5
-6
-6
-6
-6
-6
-6
-6
-6
-6
-6
-6
-6
-6
-6
-6
-6
-6
-6

Feels Like (°C)

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

Dew Point (°C)

-6
-7
-7
-7
-7
-6
-7
-7
-7
-7
-7
-7
-8
-7
-7
-7
-7
-7
-7
-7
-7
-6
-7
-6

Relative Humidity (%)

90
90
89
90
90
90
92
90
92
92
92
92
90
90
94
94
94
96
94
94
94
94
94
94

Pressure (mb)

1005
1004
1004
1004
1004
1004
1004
1004
1004
1004
1004
1004
1004
1005
1004
1004
1004
1003
1002
1001
1000
999
998
997

Ozone (du)

286
285
285
286
287
291
295
299
298
297
296
299
302
305
303
300
298
290
282
274
272
271
269
268

Thursday 25

Waxing Crescent 28%

13:50

19:22

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
00 Bad

Sun - Rise: N/A, Set: N/A, Transit: 11:56. Moon - Rise: 13:50, Set: 19:22. Civil Dark: N/A - N/A. Nautical Dark: 13:04 - 10:47. Astro Dark: 16:16 - 07:35

Total Clouds (% Sky Obscured)

99
96
93
90
89
89
91
90
90
89
92
96
100
98
96
93
79
64
48

Low Clouds (% Sky Obscured)

98
92
85
77
80
83
86
84
83
81
82
83
85
84
84
83
68
51
34

Medium Clouds (% Sky Obscured)

45
47
30
0
0
0
0
0
0
0
3
6
7
5
3
0
7
17
25

High Clouds (% Sky Obscured)

32
38
37
41
40
24
17
9
3
0
0
0
0
0
0
0
0
0
0

ISS Passover

Visibility (miles)

1
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
3
6

Fog (%)

1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1

Precipitation Type

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

Precipitation Probability (%)

76
79
69
40
33
27
19
29
33
33
33
32
34
34
31
28
27
21
9

Precipitation Amount (mm)

0.4
0.5
0.4
0.1
0
0
0
0
0.1
0
0.1
0
0.1
0
0
0
0
0
0

Wind Speed/Direction (mph)

5
6
6
7
8
7
7
7
6
5
5
4
4
4
4
4
5
5
5

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

-10
-10
-9
-9
-9
-9
-9
-8
-9
-9
-9
-10
-10
-11
-11
-11
-11
-10
-10

Dew Point (°C)

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

Relative Humidity (%)

94
94
94
94
94
92
92
92
92
92
94
94
94
94
94
94
96
94
92

Pressure (mb)

997
997
997
997
998
997
997
997
997
997
997
997
997
997
998
998
999
999
1000

Ozone (du)

268
267
265
263
262
261
260
259
257
255
252
251
251
250
250
250
250
252
254

Forecast for Longyearbyen, Spitsbergen, Svalbard and Jan Mayen (78.15,16.04)

Generated: 19/12/25 06:34:29. Forecast: 19/12/25 to 25/12/25. Timezone: UTC+1.00