Clear Outside v1.0 - International Weather Forecasts For Astronomers

Monday 22

Waxing Crescent 7%

10:02

19:03

10 Good
11 Good
12 OK
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
06 Bad
07 Bad
08 Bad
09 Bad

Sun - Rise: 07:20, Set: 16:40, Transit: 12:00. Moon - Rise: 10:02, Set: 19:03. Civil Dark: 17:11 - 06:50. Nautical Dark: 17:45 - 06:16. Astro Dark: 18:18 - 05:43

Total Clouds (% Sky Obscured)

2
13
19
67
67
76
51
52
63
85
85
93
100
100
100
100
100
100
100
100
100
100
97
98

Low Clouds (% Sky Obscured)

0
0
0
0
0
0
0
2
3
3
50
3
9
31
45
34
54
73
70
47
100
92
77
85

Medium Clouds (% Sky Obscured)

2
4
19
65
63
76
50
52
63
83
73
84
100
99
100
100
100
100
100
100
100
100
97
96

High Clouds (% Sky Obscured)

1
1
0
1
13
59
20
17
5
7
7
49
88
76
75
100
100
100
100
100
100
52
60
65

ISS Passover

Visibility (miles)

9
9
9
9
9
9
9
9
9
9
9
9
9
9
1
9
9
4
9
6
3
0
0
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
Snow
None
None
Snow
Snow
Snow
Snow
Snow
Snow
Snow

Precipitation Probability (%)

0
0
0
0
0
0
0
0
0
0
0
0
0
18
27
3
20
44
58
63
87
75
49
65

Precipitation Amount (mm)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0.1
0
0
0.1
0.2
0.3
0.6
0.4
0.1
0.3

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

-13
-13
-12
-11
-10
-10
-9
-9
-9
-8
-8
-9
-9
-9
-8
-6
-6
-5
-5
-3
-1
0
0
0

Relative Humidity (%)

41
38
36
36
37
38
42
45
48
50
51
48
48
50
52
59
61
64
67
77
88
100
96
93

Pressure (mb)

1035
1035
1034
1033
1033
1032
1032
1032
1033
1032
1032
1031
1031
1031
1030
1029
1029
1028
1027
1027
1026
1025
1023
1022

Ozone (du)

323
325
324
324
320
318
315
307
299
300
298
301
295
290
291
291
291
290
289
292
296
293
293
293

Tuesday 23

Waxing Crescent 13%

10:02

20:09

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

Sun - Rise: 07:21, Set: 16:41, Transit: 12:01. Moon - Rise: 10:02, Set: 20:09. Civil Dark: 17:11 - 06:50. Nautical Dark: 17:45 - 06:16. Astro Dark: 18:18 - 05:43

Total Clouds (% Sky Obscured)

100
100
100
100
100
100
100
100
99
92
90
54
50
37
47
44
44
41
41
44
32
24
4
8

Low Clouds (% Sky Obscured)

100
100
100
100
100
100
100
100
99
92
53
43
25
20
47
44
44
41
41
40
31
21
2
5

Medium Clouds (% Sky Obscured)

100
70
26
12
6
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

High Clouds (% Sky Obscured)

65
3
6
3
2
7
22
23
19
6
79
36
22
17
0
0
0
0
0
0
0
1
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

Very Light Rain
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 (%)

62
41
22
6
16
0
3
14
3
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Precipitation Amount (mm)

0.2
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
8
8
7
7
6
5
6
5
6
6
7
9
9
10
11
11
12
12
13
13
13
13

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

89
91
93
89
91
89
88
88
89
91
94
94
89
83
85
78
78
77
76
73
67
65
65
61

Pressure (mb)

1021
1020
1017
1016
1015
1014
1014
1014
1014
1014
1014
1014
1014
1014
1014
1014
1015
1016
1016
1017
1018
1019
1020
1022

Ozone (du)

292
292
291
292
292
294
294
298
300
302
304
304
306
305
302
301
300
297
298
298
298
298
299
298

Wednesday 24

Waxing Crescent 21%

10:29

21:15

10 Good
11 OK
12 OK
13 Good
14 Good
15 Good
16 Good
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

Sun - Rise: 07:21, Set: 16:41, Transit: 12:01. Moon - Rise: 10:29, Set: 21:15. Civil Dark: 17:12 - 06:51. Nautical Dark: 17:46 - 06:17. Astro Dark: 18:19 - 05:44

Total Clouds (% Sky Obscured)

9
23
19
6
7
7
15
54
79
100
87
77
71
100
100
91
87
74
100
100
95
95
86
93

Low Clouds (% Sky Obscured)

7
20
1
1
1
0
0
0
0
0
0
0
0
0
0
0
1
5
10
41
85
88
86
93

Medium Clouds (% Sky Obscured)

0
0
0
0
0
0
3
40
60
86
72
69
59
77
91
91
87
74
98
100
95
87
16
12

High Clouds (% Sky Obscured)

1
0
19
6
7
7
15
30
39
68
39
32
37
88
49
54
28
41
97
15
15
12
24
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
3
7
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
Snow
None
None
None

Precipitation Probability (%)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
5
16
2
0
1
15
44
25
21
19

Precipitation Amount (mm)

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

Wind Speed/Direction (mph)

12
13
13
13
12
10
8
7
6
5
5
4
4
3
3
3
2
1
1
4
3
5
6
6

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

-3
-3
-3
-3
-3
-3
-3
-4
-5
-6
-6
-6
-6
-6
-6
-6
-7
-7
-8
-8
-7
-6
-4
-4

Relative Humidity (%)

59
56
53
51
50
51
54
56
58
58
59
60
60
61
61
60
58
58
55
53
56
60
73
70

Pressure (mb)

1023
1023
1022
1022
1023
1024
1025
1026
1026
1027
1027
1027
1027
1027
1026
1025
1025
1023
1023
1022
1022
1022
1020
1020

Ozone (du)

297
296
297
299
299
297
295
296
294
297
298
300
303
302
300
299
301
304
305
307
309
306
309
310

Thursday 25

Waxing Crescent 30%

10:53

22:22

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
06 Bad
07 Bad
08 Bad
09 Bad

Sun - Rise: 07:21, Set: 16:42, Transit: 12:02. Moon - Rise: 10:53, Set: 22:22. Civil Dark: 17:12 - 06:51. Nautical Dark: 17:46 - 06:17. Astro Dark: 18:19 - 05:44

Total Clouds (% Sky Obscured)

99
99
100
100
100
100
100
99
99
94
68
55
79
87
100
98
95
93
91
89
86
91
96
100

Low Clouds (% Sky Obscured)

82
67
52
38
41
37
33
15
4
3
0
2
2
1
2
1
0
0
1
1
0
28
56
85

Medium Clouds (% Sky Obscured)

18
24
30
28
34
32
34
63
42
44
37
21
29
28
81
83
81
93
87
82
81
87
89
92

High Clouds (% Sky Obscured)

58
81
95
100
100
100
98
96
95
67
36
11
44
75
100
86
68
39
46
49
42
62
86
100

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
3

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

Precipitation Probability (%)

17
36
25
2
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
2
6
23

Precipitation Amount (mm)

0
0.2
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
7
6
6
6
6
5
6
6
6
5
6
5
5
5
5
5
6
7
6
6
7
7
8

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

-5
-3
-1
1
2
3
3
2
2
1
0
-1
-1
-2
-3
-3
-4
-5
-5
-6
-7
-9
-11
-14

Relative Humidity (%)

62
67
76
82
86
88
86
89
89
89
86
84
83
83
80
77
74
71
68
68
62
54
45
37

Pressure (mb)

1019
1018
1017
1016
1015
1015
1015
1016
1017
1018
1019
1019
1020
1020
1020
1021
1021
1021
1021
1021
1021
1022
1022
1023

Ozone (du)

311
307
307
307
304
303
302
298
297
296
296
297
296
295
292
288
286
284
283
284
285
287
289
289

Friday 26

Waxing Crescent 41%

11:15

23:29

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
06 Bad
07 Bad
08 Bad
09 OK

Sun - Rise: 07:22, Set: 16:43, Transit: 12:02. Moon - Rise: 11:15, Set: 23:29. Civil Dark: 17:13 - 06:51. Nautical Dark: 17:47 - 06:17. Astro Dark: 18:20 - 05:44

Total Clouds (% Sky Obscured)

100
100
100
100
100
100
100
100
100
100
100
100
99
100
97
96
95
93
87
81
75
56
42
23

Low Clouds (% Sky Obscured)

90
95
100
100
100
100
100
100
100
100
100
100
99
100
97
92
88
83
81
80
75
56
42
23

Medium Clouds (% Sky Obscured)

95
98
100
100
100
100
100
100
100
97
77
57
56
50
47
5
5
2
2
3
5
4
3
2

High Clouds (% Sky Obscured)

100
100
100
100
100
100
90
83
70
3
8
37
49
73
4
4
3
1
1
0
0
0
0
0

ISS Passover

Visibility (miles)

2
2
2
1
2
1
0
0
0
0
0
0
0
2
4
1
1
1
1
3
6
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
Snow
Snow
Snow
Snow
Snow
Snow
Snow
Snow
Snow
Snow
Snow
Very Light Rain
Light Rain
None
None
None
None
None
None
None
None
None

Precipitation Probability (%)

26
36
59
77
95
95
95
95
95
91
72
64
63
67
71
18
19
13
16
14
10
8
6
1

Precipitation Amount (mm)

0
0
0.3
0.4
0.6
1.1
1.2
1.5
0.8
0.6
0.3
0.3
0.3
0.3
0.4
0
0
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

-14
-12
-8
-4
-4
-4
-4
-3
-3
-2
-2
-1
-1
-1
-2
-2
-1
-0
0
-0
-1
-1
-1
0

Relative Humidity (%)

36
40
59
81
81
83
86
91
94
96
94
96
94
94
92
92
92
93
93
91
91
89
88
88

Pressure (mb)

1022
1022
1021
1019
1019
1019
1018
1018
1018
1017
1016
1015
1015
1014
1014
1014
1012
1012
1013
1013
1014
1015
1016
1017

Ozone (du)

290
291
290
293
295
299
302
307
311
317
322
323
325
330
335
335
336
337
338
336
334
332
329
326

Saturday 27

First Quarter 52%

11:38

00:38

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

Sun - Rise: 07:22, Set: 16:43, Transit: 12:03. Moon - Rise: 11:38, Set: 00:38. Civil Dark: 17:14 - 06:52. Nautical Dark: 17:48 - 06:18. Astro Dark: 18:21 - 05:45

Total Clouds (% Sky Obscured)

35
51
67
73
77
68
51
41
30
31
32
33
58
86
100
100
100
100
100
100
100
100
100
100

Low Clouds (% Sky Obscured)

35
51
67
73
71
62
51
41
30
20
10
0
0
5
15
30
40
60
80
95
100
100
100
100

Medium Clouds (% Sky Obscured)

1
0
0
0
0
0
0
0
0
0
0
0
35
86
95
100
100
100
100
100
100
89
77
68

High Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
11
22
33
58
86
100
100
100
100
100
100
100
100
100
100

ISS Passover

Visibility (miles)

9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
6
3
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
Very Light Rain
Light Rain
Very Light Rain
Very Light Rain
None

Precipitation Probability (%)

1
1
0
0
0
0
0
0
0
0
0
0
0
0
0
1
6
8
42
64
80
69
64
50

Precipitation Amount (mm)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0.3
0.4
0.3
0.2
0

Wind Speed/Direction (mph)

11
11
11
11
11
10
10
8
7
6
5
5
4
4
4
4
4
4
4
4
5
6
7
8

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

88
89
89
91
91
91
89
91
93
94
93
93
93
94
94
94
96
98
100
100
100
100
100
98

Pressure (mb)

1018
1019
1019
1019
1019
1020
1021
1021
1022
1022
1022
1022
1022
1022
1022
1021
1021
1020
1020
1019
1018
1018
1017
1016

Ozone (du)

323
323
323
323
320
318
315
313
312
311
309
308
307
306
306
305
304
303
302
304
306
308
309
310

Sunday 28

Waxing Gibbous 63%

12:02

01:50

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
06 Bad

Sun - Rise: 07:22, Set: 16:44, Transit: 12:03. Moon - Rise: 12:02, Set: 01:50. Civil Dark: 17:14 - 06:52. Nautical Dark: 17:48 - 06:18. Astro Dark: 18:21 - 05:45

Total Clouds (% Sky Obscured)

100
100
100
100
100
100
100
100
100
86
69
48
48
54
49
50
43
41
52
58
66

Low Clouds (% Sky Obscured)

96
97
93
90
87
93
91
91
90
86
69
48
48
54
49
50
43
41
52
58
64

Medium Clouds (% Sky Obscured)

80
90
100
90
81
72
53
34
10
10
5
5
5
0
0
0
0
5
4
2
1

High Clouds (% Sky Obscured)

100
100
100
99
99
100
100
100
90
80
60
30
15
20
40
50
43
41
52
32
0

ISS Passover

Visibility (miles)

0
0
0
0
0
0
0
3
6
9
9
9
9
8
6
4
6
8
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

Precipitation Type

Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Snow
Snow
Snow
Snow
Snow
Light Rain
Light Rain
None

Precipitation Probability (%)

73
86
95
87
91
95
95
95
95
95
95
95
95
95
95
95
95
95
95
89
58

Precipitation Amount (mm)

0.4
0.6
0.7
0.6
0.6
1
1.4
1.5
1.3
1.1
1.1
1.2
1.4
1.5
1.7
1.6
1.4
1.2
0.9
0.5
0

Wind Speed/Direction (mph)

9
8
9
11
10
10
10
11
12
14
14
14
14
13
12
11
10
11
11
12
12

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

-1
-1
-1
0
2
1
1
2
2
2
-0
-1
-2
-3
-2
-3
-6
-5
-6
-5
-5

Dew Point (°C)

4
4
5
5
6
6
6
4
1
-2
-3
-4
-5
-5
-5
-5
-6
-7
-9
-8
-8

Relative Humidity (%)

98
98
98
96
98
96
96
85
74
63
63
63
63
65
66
67
63
60
56
57
58

Pressure (mb)

1015
1013
1012
1010
1010
1009
1009
1009
1009
1009
1008
1007
1007
1006
1005
1004
1003
1003
1003
1003
1003

Ozone (du)

310
314
318
322
333
344
355
352
350
347
347
347
347
349
351
352
359
365
371
371
371

Forecast for Swarthmore, Delaware, United States of America (39.90,-75.35)

Generated: 22/12/25 10:05:44. Forecast: 22/12/25 to 28/12/25. Timezone: UTC-5.00