Clear Outside v1.0 - International Weather Forecasts For Astronomers

Monday 15

Waning Crescent 30%

No Rise

No Set

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
14 Bad
15 Bad

Sun - Rise: 05:49, Set: 19:59, Transit: 12:50. Moon - Rise: No Rise, Set: No Set. Civil Dark: 21:59 - 03:52. Nautical Dark: N/A - N/A. Astro Dark: N/A - N/A

Total Clouds (% Sky Obscured)

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

Low Clouds (% Sky Obscured)

60
57
58
60
67
70
71
71
68
74
63
64
74
86
89
87
83
80
79
82
76
72
80
88

Medium Clouds (% Sky Obscured)

100
99
99
95
93
93
90
90
96
95
98
94
93
93
92
90
91
87
92
87
81
79
75
66

High Clouds (% Sky Obscured)

100
89
75
46
23
21
11
3
3
4
8
30
31
35
27
16
8
3
3
19
15
15
22
20

ISS Passover

Visibility (miles)

0
0
0
0
0
0
0
0
0
0
2
3
4
4
7
9
9
9
9
9
9
9
9
9

Fog (%)

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

Precipitation Type

Snow
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 (%)

36
31
35
35
34
33
30
28
31
24
20
10
12
7
4
3
3
2
2
3
7
6
12
19

Precipitation Amount (mm)

0.1
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
3
4
4
4
4
4
5
5
5
5
5
6
6
6
7
7
7
7
7
7
7
7
7

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

-3
-3
-4
-4
-4
-4
-4
-4
-4
-5
-4
-5
-5
-6
-6
-6
-6
-7
-6
-6
-6
-7
-6
-7

Dew Point (°C)

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

Relative Humidity (%)

98
98
98
98
98
98
98
96
98
96
96
92
91
89
89
89
89
87
82
82
82
79
78
78

Pressure (mb)

1014
1013
1013
1014
1014
1014
1014
1014
1015
1015
1015
1015
1015
1015
1015
1016
1016
1016
1017
1017
1018
1018
1018
1019

Ozone (du)

295
294
293
292
294
294
295
296
296
297
297
298
298
297
295
294
293
292
292
292
293
293
293
294

Tuesday 16

Waning Crescent 20%

No Rise

No Set

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
14 Bad
15 OK

Sun - Rise: 05:56, Set: 19:51, Transit: 12:50. Moon - Rise: No Rise, Set: No Set. Civil Dark: 21:48 - 04:02. Nautical Dark: N/A - N/A. Astro Dark: N/A - N/A

Total Clouds (% Sky Obscured)

97
84
96
97
83
96
89
86
87
84
86
90
87
88
84
84
82
94
94
95
91
92
75
38

Low Clouds (% Sky Obscured)

90
74
91
91
72
88
72
80
82
70
81
80
76
72
77
69
67
94
91
88
88
84
70
38

Medium Clouds (% Sky Obscured)

37
24
24
27
27
79
40
9
3
0
0
0
0
0
0
4
2
1
0
0
44
39
3
16

High Clouds (% Sky Obscured)

20
37
41
36
41
61
24
14
17
16
26
34
30
38
46
37
15
8
4
10
37
32
22
11

ISS Passover

Visibility (miles)

9
9
9
9
9
8
3
1
5
6
6
5
9
9
9
9
8
6
7
8
9
9
9
9

Fog (%)

0
0
0
1
0
1
0
1
0
0
1
1
2
2
1
1
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
Snow
None
None
None
None
None

Precipitation Probability (%)

18
8
4
5
1
8
13
15
18
10
10
14
14
5
6
1
4
17
25
20
15
7
1
0

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)

8
8
8
8
8
8
7
8
7
8
8
8
8
8
7
7
7
6
6
7
8
8
7
7

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

79
81
81
82
84
84
85
85
87
84
82
81
79
79
77
79
77
77
79
77
79
79
77
79

Pressure (mb)

1019
1019
1020
1020
1020
1021
1021
1021
1021
1022
1022
1022
1022
1022
1022
1022
1022
1022
1022
1023
1022
1022
1022
1022

Ozone (du)

295
296
298
299
301
302
304
306
307
309
309
309
309
308
307
306
306
306
305
305
304
303
303
303

Wednesday 17

Waning Crescent 12%

No Rise

No Set

16 OK
17 OK
18 OK
19 OK
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
14 Bad
15 Bad

Sun - Rise: 06:04, Set: 19:43, Transit: 12:49. Moon - Rise: No Rise, Set: No Set. Civil Dark: 21:37 - 04:12. Nautical Dark: N/A - N/A. Astro Dark: N/A - N/A

Total Clouds (% Sky Obscured)

41
42
38
46
63
60
55
49
50
64
75
78
80
75
77
82
79
82
83
74
69
69
71
73

Low Clouds (% Sky Obscured)

37
30
28
31
45
45
45
33
29
23
23
23
23
25
29
32
38
41
41
39
34
26
26
26

Medium Clouds (% Sky Obscured)

29
42
38
45
48
49
50
38
26
17
11
6
0
0
0
0
0
0
0
0
0
0
0
0

High Clouds (% Sky Obscured)

10
12
11
18
37
25
11
13
21
54
62
66
60
53
49
49
51
47
44
38
40
36
33
31

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
4
0
0
0
0
0
0
0
0
0
0
0
1
1
2
1
1
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)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

81
80
80
80
82
79
79
77
76
76
74
72
71
70
68
67
63
63
60
61
61
63
65
67

Pressure (mb)

1022
1022
1022
1022
1022
1021
1021
1021
1021
1020
1020
1019
1019
1019
1019
1019
1018
1018
1018
1018
1018
1017
1017
1017

Ozone (du)

303
301
300
298
298
297
297
296
296
295
296
295
295
295
295
295
294
294
294
294
294
294
293
293

Thursday 18

Waning Crescent 6%

No Rise

No Set

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
14 Bad
15 Bad

Sun - Rise: 06:11, Set: 19:35, Transit: 12:49. Moon - Rise: No Rise, Set: No Set. Civil Dark: 21:27 - 04:21. Nautical Dark: N/A - N/A. Astro Dark: N/A - N/A

Total Clouds (% Sky Obscured)

75
76
77
77
80
72
72
70
68
66
66
66
70
76
82
86
85
85
85
85
85
86
85
82

Low Clouds (% Sky Obscured)

26
26
29
29
30
30
31
29
25
23
23
23
24
30
40
47
48
48
48
48
48
48
41
35

Medium Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
4
6
8
5
2
1
1
4
0
0
1
1
15
22

High Clouds (% Sky Obscured)

31
30
30
30
30
30
30
40
40
40
35
30
30
22
25
18
19
10
10
10
15
15
20
20

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
1
2
3
1
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)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

71
73
76
76
77
77
77
79
79
79
79
80
80
80
82
82
80
80
80
79
80
80
79
80

Pressure (mb)

1017
1017
1016
1016
1016
1016
1016
1016
1016
1016
1016
1016
1015
1015
1015
1015
1015
1015
1015
1015
1014
1014
1014
1014

Ozone (du)

293
293
294
296
297
297
298
298
298
299
300
300
301
301
302
302
302
301
300
300
300
301
301
301

Friday 19

Waning Crescent 2%

01:32

22:03

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 OK
08 OK
09 OK
10 Good
11 OK
12 OK
13 OK
14 OK
15 OK

Sun - Rise: 06:18, Set: 19:27, Transit: 12:49. Moon - Rise: 01:32, Set: 22:03. Civil Dark: 21:17 - 04:29. Nautical Dark: N/A - N/A. Astro Dark: N/A - N/A

Total Clouds (% Sky Obscured)

82
87
91
95
93
88
88
88
85
87
77
67
59
59
53
48
38
28
18
21
24
25
27
29

Low Clouds (% Sky Obscured)

29
35
41
47
39
42
45
45
47
47
40
32
26
26
25
26
20
16
13
16
22
25
27
23

Medium Clouds (% Sky Obscured)

40
46
50
58
64
59
54
55
56
56
42
28
14
10
6
2
1
1
0
0
0
0
0
0

High Clouds (% Sky Obscured)

25
30
30
40
10
10
10
20
25
24
25
24
22
17
15
15
10
7
4
6
7
9
12
13

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

79
80
82
80
82
82
82
83
82
83
83
83
85
83
85
85
85
83
85
85
83
83
82
83

Pressure (mb)

1013
1013
1013
1012
1012
1013
1012
1012
1011
1011
1011
1010
1010
1009
1009
1009
1009
1008
1008
1008
1008
1008
1008
1008

Ozone (du)

301
301
300
300
299
298
297
296
295
294
292
291
290
290
290
290
291
291
291
291
292
292
293
293

Saturday 20

Waning Crescent 0%

05:11

19:59

16 OK
17 OK
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
14 Bad
15 Bad

Sun - Rise: 06:25, Set: 19:19, Transit: 12:48. Moon - Rise: 05:11, Set: 19:59. Civil Dark: 21:08 - 04:38. Nautical Dark: N/A - N/A. Astro Dark: N/A - N/A

Total Clouds (% Sky Obscured)

31
38
44
51
65
76
90
91
93
95
94
93
89
88
87
83
81
79
80
69
61
56
64
82

Low Clouds (% Sky Obscured)

20
21
22
22
21
20
19
26
33
46
48
45
46
48
47
45
46
47
47
42
38
33
43
49

Medium Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
5
11
16
40
57
51
28
10
10
10
10
15
15
25

High Clouds (% Sky Obscured)

15
24
33
41
54
66
70
60
60
70
60
65
65
60
70
75
65
50
45
50
35
30
15
5

ISS Passover

Visibility (miles)

9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
6
3
0
0
0
0
0

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
Snow
Snow
Snow

Precipitation Probability (%)

0
1
1
1
2
2
1
3
3
1
2
2
1
5
5
3
13
16
15
28
34
37
43
47

Precipitation Amount (mm)

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

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

83
83
85
85
87
85
83
82
82
80
80
80
80
80
82
84
85
85
87
87
90
92
94
92

Pressure (mb)

1008
1008
1009
1009
1009
1009
1009
1010
1010
1010
1010
1010
1010
1010
1011
1011
1011
1011
1011
1012
1012
1012
1012
1012

Ozone (du)

294
294
293
291
290
289
289
288
286
284
283
284
286
287
286
285
284
284
283
282
282
281
280
281

Sunday 21

New Moon 0%

08:04

18:44

16 Bad
17 Bad
18 Bad
19 Bad
20 Bad
21 Bad
22 Bad
23 Bad
00 Bad
01 Bad

Sun - Rise: 06:32, Set: 19:11, Transit: 12:48. Moon - Rise: 08:04, Set: 18:44. Civil Dark: 20:58 - 04:46. Nautical Dark: N/A - N/A. Astro Dark: N/A - N/A

Total Clouds (% Sky Obscured)

94
95
96
96
97
97
96
95
95
98

Low Clouds (% Sky Obscured)

62
66
70
71
68
63
54
51
47
44

Medium Clouds (% Sky Obscured)

25
38
51
69
71
72
75
82
88
97

High Clouds (% Sky Obscured)

0
0
0
0
0
0
0
7
15
22

ISS Passover

Visibility (miles)

0
0
0
0
0
1
1
2
2
1

Fog (%)

0
0
0
0
0
0
0
0
0
0

Precipitation Type

Snow
Snow
Snow
Snow
Snow
None
None
None
None
None

Precipitation Probability (%)

51
49
46
45
41
34
22
21
20
15

Precipitation Amount (mm)

0.2
0.2
0.2
0.2
0.1
0
0
0
0
0

Wind Speed/Direction (mph)

4
3
3
3
3
3
4
4
4
4

Chance of Frost

Temperature (°C)

-6
-6
-6
-6
-7
-7
-7
-7
-7
-6

Feels Like (°C)

-10
-10
-10
-10
-10
-10
-10
-11
-11
-11

Dew Point (°C)

-7
-7
-7
-7
-7
-7
-7
-8
-8
-7

Relative Humidity (%)

94
94
94
96
96
94
94
92
90
92

Pressure (mb)

1012
1012
1012
1012
1012
1012
1012
1012
1011
1011

Ozone (du)

281
282
282
281
281
281
280
280
280
280

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

Generated: 15/09/25 16:28:21. Forecast: 15/09/25 to 21/09/25. Timezone: UTC+2.00