Clear Outside v1.0 - International Weather Forecasts For Astronomers

Sunday 21

Waxing Crescent 2%

09:41

17:32

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
00 Bad
01 Bad

Sun - Rise: 08:08, Set: 16:36, Transit: 12:22. Moon - Rise: 09:41, Set: 17:32. Civil Dark: 17:12 - 07:33. Nautical Dark: 17:51 - 06:54. Astro Dark: 18:28 - 06:16

Total Clouds (% Sky Obscured)

73
78
84
87
94
100
97
99
87
60
57
54
53
57
55
75
60
80
81
100
71
82
98
100

Low Clouds (% Sky Obscured)

38
42
42
43
47
50
55
55
55
55
51
49
49
50
52
53
55
55
55
55
55
55
53
55

Medium Clouds (% Sky Obscured)

28
33
29
36
60
61
48
44
15
36
49
49
38
43
39
23
6
4
3
7
22
40
52
3

High Clouds (% Sky Obscured)

69
78
84
87
93
100
75
76
43
6
7
6
7
12
6
35
13
43
50
83
9
17
70
70

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 (%)

86
87
84
84
86
87
87
88
89
93
97
77
16
44
84
100
99
95
89
83
77
71
52
34

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)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

86
87
88
89
89
89
91
88
81
74
72
69
71
75
82
86
88
86
88
88
89
91
91
89

Pressure (mb)

1015
1015
1015
1014
1014
1014
1014
1014
1013
1012
1012
1011
1010
1010
1009
1009
1009
1009
1009
1009
1009
1009
1009
1009

Ozone (du)

274
275
276
275
277
278
278
280
280
281
280
282
284
280
278
278
280
280
282
282
286
285
285
286

Monday 22

Waxing Crescent 6%

10:15

18:42

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
00 Bad
01 Bad

Sun - Rise: 08:09, Set: 16:37, Transit: 12:23. Moon - Rise: 10:15, Set: 18:42. Civil Dark: 17:12 - 07:33. Nautical Dark: 17:51 - 06:54. Astro Dark: 18:29 - 06:17

Total Clouds (% Sky Obscured)

100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
99
84
82
86
92
88
78
98

Low Clouds (% Sky Obscured)

55
60
60
55
55
55
55
54
48
40
32
15
14
13
19
25
29
33
35
39
45
46
55
60

Medium Clouds (% Sky Obscured)

45
48
30
16
2
2
22
58
55
34
58
60
88
63
56
22
18
8
1
0
5
14
10
13

High Clouds (% Sky Obscured)

100
100
91
76
75
70
61
89
100
100
100
100
100
99
100
100
96
52
51
47
37
39
25
49

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 (%)

21
19
12
4
0
0
3
8
12
19
34
15
21
13
27
31
26
20
13
68
79
80
81
77

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)

4
4
4
4
4
4
3
3
3
3
3
3
3
3
2
3
3
3
3
3
4
4
4
4

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

91
89
91
89
87
89
87
84
78
75
73
70
73
79
86
88
89
87
89
91
92
94
92
92

Pressure (mb)

1009
1009
1009
1009
1009
1009
1010
1010
1010
1010
1009
1009
1008
1008
1009
1009
1009
1009
1010
1010
1010
1010
1009
1010

Ozone (du)

286
287
291
297
301
303
309
323
324
323
325
326
334
344
353
365
372
373
374
377
380
384
387
389

Tuesday 23

Waxing Crescent 12%

10:42

19:55

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
00 Bad
01 Bad

Sun - Rise: 08:09, Set: 16:37, Transit: 12:23. Moon - Rise: 10:42, Set: 19:55. Civil Dark: 17:13 - 07:34. Nautical Dark: 17:52 - 06:54. Astro Dark: 18:29 - 06:17

Total Clouds (% Sky Obscured)

86
90
89
100
100
100
100
100
98
73
88
94
90
98
97
65
60
68
84
100
100
100
100
100

Low Clouds (% Sky Obscured)

60
65
60
60
60
60
55
55
55
55
53
55
54
55
58
60
60
68
84
100
100
100
100
100

Medium Clouds (% Sky Obscured)

3
9
3
25
45
64
30
49
29
3
3
3
12
60
48
41
38
28
14
0
0
0
0
0

High Clouds (% Sky Obscured)

44
45
44
66
99
100
100
50
60
40
62
58
45
57
68
60
55
58
66
70
47
20
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
4
2
2
2
9

Fog (%)

71
70
70
70
70
70
74
80
86
78
88
52
37
77
97
17
22
64
64
64
64
64
64
64

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
2
3
3
6

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

92
92
91
92
91
89
91
89
83
78
75
73
74
77
84
91
92
94
96
96
91
92
91
87

Pressure (mb)

1010
1010
1010
1010
1010
1010
1011
1011
1012
1012
1011
1011
1011
1011
1011
1012
1012
1013
1013
1014
1014
1014
1014
1014

Ozone (du)

388
387
385
385
387
387
385
385
385
386
386
385
384
384
384
383
384
383
383
387
382
380
378
374

Wednesday 24

Waxing Crescent 19%

11:03

21:08

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
00 Bad
01 Bad

Sun - Rise: 08:10, Set: 16:38, Transit: 12:24. Moon - Rise: 11:03, Set: 21:08. Civil Dark: 17:13 - 07:34. Nautical Dark: 17:53 - 06:55. Astro Dark: 18:30 - 06:17

Total Clouds (% Sky Obscured)

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

Low Clouds (% Sky Obscured)

100
100
100
100
100
100
100
100
99
97
96
95
93
92
92
93
94
93
93
93
93
93
93
96

Medium Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
14
25
37
47
53
60
55
55
55
46
41
38
85
80
78
64

High Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
0
18
35
53
44
40
30
42
53
68
74
61
52
16

ISS Passover

Visibility (miles)

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

Fog (%)

64
64
64
64
64
64
64
64
64
64
64
64
64
64
64
64
64
64
64
64
64
64
64
64

Precipitation Type

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

Precipitation Probability (%)

9
12
16
26
23
22
28
25
25
24
31
27
37
41
33
39
36
33
34
31
23
21
7
5

Precipitation Amount (mm)

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

Wind Speed/Direction (mph)

5
4
3
5
6
8
9
10
12
12
13
14
14
15
15
15
15
15
14
13
12
11
10
9

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

83
86
91
92
94
94
96
96
89
83
80
78
74
71
72
76
78
79
79
81
79
79
78
76

Pressure (mb)

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

Ozone (du)

371
372
373
379
380
383
386
388
387
391
396
399
400
399
398
397
397
404
410
411
411
407
406
404

Thursday 25

Waxing Crescent 28%

11:21

22:21

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
00 Bad
01 Bad

Sun - Rise: 08:10, Set: 16:38, Transit: 12:24. Moon - Rise: 11:21, Set: 22:21. Civil Dark: 17:14 - 07:34. Nautical Dark: 17:53 - 06:55. Astro Dark: 18:31 - 06:18

Total Clouds (% Sky Obscured)

99
100
100
98
100
100
100
100
99
99
98
97
97
96
90
85
79
71
61
59
56
53
50
53

Low Clouds (% Sky Obscured)

98
100
100
94
90
88
84
86
89
66
64
68
63
62
63
64
66
66
61
59
56
53
50
53

Medium Clouds (% Sky Obscured)

52
45
0
0
57
68
3
0
0
0
0
10
22
32
26
18
10
8
5
3
2
1
0
0

High Clouds (% Sky Obscured)

10
42
13
51
73
78
83
89
76
63
60
50
50
50
20
19
16
8
3
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 (%)

64
64
64
64
64
64
64
64
64
64
64
64
64
64
64
64
64
64
64
64
64
64
64
64

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 (%)

6
2
2
1
1
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)

8
8
7
7
7
7
7
7
7
7
8
8
9
9
9
8
7
6
5
4
4
4
4
3

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

-9
-9
-8
-8
-8
-8
-7
-7
-6
-6
-4
-4
-4
-4
-4
-4
-4
-4
-4
-4
-3
-3
-3
-2

Dew Point (°C)

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

Relative Humidity (%)

76
76
78
78
81
79
79
78
74
70
67
65
66
68
70
71
75
78
79
81
82
84
86
87

Pressure (mb)

1019
1019
1019
1019
1019
1019
1020
1021
1021
1021
1021
1020
1020
1021
1021
1021
1022
1022
1023
1023
1023
1023
1023
1024

Ozone (du)

404
408
409
407
404
401
401
403
401
398
396
393
389
385
381
379
378
376
373
370
367
366
365
363

Friday 26

Waxing Crescent 38%

11:37

23:35

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
00 Bad
01 Bad

Sun - Rise: 08:10, Set: 16:39, Transit: 12:25. Moon - Rise: 11:37, Set: 23:35. Civil Dark: 17:15 - 07:35. Nautical Dark: 17:54 - 06:56. Astro Dark: 18:31 - 06:18

Total Clouds (% Sky Obscured)

51
54
49
40
44
59
69
70
78
86
94
92
86
81
86
91
97
98
99
100
100
100
100
100

Low Clouds (% Sky Obscured)

51
54
49
40
44
49
51
52
65
78
90
88
84
80
85
91
97
98
99
100
100
100
100
100

Medium Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
5
10
11
7

High Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
2
3
10
24
39
34

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 (%)

64
64
64
64
64
64
64
64
64
64
64
64
64
64
64
64
64
64
64
64
64
64
64
64

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
1
1
3
1
3
3
2
0
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)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

-5
-4
-4
-4
-4
-4
-4
-4
-4
-4
-5
-4
-5
-5
-4
-4
-5
-5
-4
-4
-4
-4
-4
-5

Relative Humidity (%)

87
91
91
92
92
94
92
89
87
84
79
77
77
79
81
83
86
87
89
89
91
89
89
87

Pressure (mb)

1024
1024
1024
1024
1024
1025
1025
1025
1025
1025
1024
1024
1024
1024
1025
1025
1026
1026
1026
1027
1027
1027
1027
1027

Ozone (du)

365
366
367
367
368
368
367
366
366
366
367
367
366
365
364
362
359
357
356
355
353
349
345
340

Saturday 27

First Quarter 49%

11:53

00:50

Sun - Rise: 08:11, Set: 16:40, Transit: 12:25. Moon - Rise: 11:53, Set: 00:50. Civil Dark: 17:15 - 07:35. Nautical Dark: 17:55 - 06:56. Astro Dark: 18:32 - 06:18

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 Lettenboden, Bezirk Pfäffikon, Switzerland (47.38,8.92)

Generated: 21/12/25 02:57:21. Forecast: 21/12/25 to 27/12/25. Timezone: UTC+1.00