Clear Outside v1.0 - International Weather Forecasts For Astronomers

Monday 8

Waning Gibbous 75%

No Rise

11:20

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

Sun - Rise: 07:12, Set: 16:36, Transit: 11:54. Moon - Rise: No Rise, Set: 11:20. Civil Dark: 17:06 - 06:41. Nautical Dark: 17:40 - 06:07. Astro Dark: 18:13 - 05:35

Total Clouds (% Sky Obscured)

100
88
47
82
66
86
63
35
2
0
0
0
1
21
99
100
100
99
93
91
85
84
77
100

Low Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
27
50
57
48
47
42
58
42
50

Medium Clouds (% Sky Obscured)

100
82
47
78
61
84
53
30
2
0
0
0
0
8
98
100
100
97
89
86
50
83
77
100

High Clouds (% Sky Obscured)

54
39
31
67
20
15
14
1
0
0
0
0
1
20
1
78
18
60
3
62
65
65
63
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
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)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

-10
-11
-10
-11
-10
-10
-10
-10
-10
-8
-8
-7
-6
-5
-6
-5
-5
-5
-5
-5
-6
-6
-5
-6

Dew Point (°C)

-21
-22
-21
-21
-21
-21
-22
-21
-22
-22
-22
-22
-22
-22
-21
-19
-17
-14
-13
-11
-10
-8
-8
-7

Relative Humidity (%)

27
27
27
26
27
27
28
28
27
27
27
26
24
22
21
22
26
32
36
43
51
57
61
62

Pressure (mb)

1027
1026
1026
1026
1025
1025
1025
1025
1025
1025
1025
1025
1025
1025
1024
1022
1021
1020
1019
1018
1018
1018
1017
1016

Ozone (du)

328
327
331
334
345
350
353
352
352
353
351
348
363
389
402
401
400
391
380
365
360
360
357
357

Tuesday 9

Waning Gibbous 65%

22:00

11:45

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
16 Bad
17 Bad
18 Bad
19 Bad
20 Bad

Sun - Rise: 07:12, Set: 16:36, Transit: 11:54. Moon - Rise: 22:00, Set: 11:45. Civil Dark: 17:06 - 06:42. Nautical Dark: 17:40 - 06:08. Astro Dark: 18:13 - 05:35

Total Clouds (% Sky Obscured)

100
100
100
100
100
100
92
100
100
100
100
100
100
100
100
100
100
100
100
100
87
87
93
88

Low Clouds (% Sky Obscured)

71
81
73
50
62
65
62
56
64
78
72
86
80
79
75
87
99
99
86
87
85
79
87
82

Medium Clouds (% Sky Obscured)

83
91
93
100
96
94
78
68
100
77
90
100
100
100
100
100
99
100
100
100
64
26
76
27

High Clouds (% Sky Obscured)

100
100
100
100
100
99
50
100
100
100
100
100
100
100
100
100
100
100
29
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
7
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
Light Rain
Light Rain
Very Light Rain
None
None
None
None
None

Precipitation Probability (%)

0
0
0
0
0
0
0
0
0
0
1
2
9
6
17
44
89
95
70
49
33
38
26
4

Precipitation Amount (mm)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0.5
0.6
0.2
0
0
0
0
0

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

68
74
78
78
80
80
83
84
86
86
84
81
77
73
68
64
62
66
75
69
73
72
79
76

Pressure (mb)

1015
1015
1014
1013
1013
1012
1011
1010
1009
1009
1008
1007
1005
1004
1002
1000
999
998
997
997
997
997
997
997

Ozone (du)

357
353
350
346
345
342
341
343
345
344
341
344
341
338
334
332
330
330
336
338
342
347
347
346

Wednesday 10

Waning Gibbous 54%

23:07

12:08

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 OK
11 OK
12 OK
13 OK
14 OK
15 OK
16 OK
17 OK
18 OK
19 Bad
20 Bad

Sun - Rise: 07:13, Set: 16:36, Transit: 11:55. Moon - Rise: 23:07, Set: 12:08. Civil Dark: 17:07 - 06:43. Nautical Dark: 17:40 - 06:09. Astro Dark: 18:13 - 05:36

Total Clouds (% Sky Obscured)

84
79
74
57
90
93
81
79
99
100
100
100
54
20
27
19
26
19
27
27
26
34
47
62

Low Clouds (% Sky Obscured)

77
39
43
36
37
37
34
25
0
31
64
34
4
0
14
5
13
19
27
27
26
24
37
40

Medium Clouds (% Sky Obscured)

57
59
56
31
69
74
81
72
98
100
100
100
54
20
27
19
26
4
0
0
1
34
47
60

High Clouds (% Sky Obscured)

0
0
0
0
0
30
0
2
23
24
22
1
1
0
0
0
0
0
0
0
0
5
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 (%)

5
7
28
10
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
2
1
3
2

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
12
11
12
11
13
14
14
14
14
12
12
14
14
14
13
13
12
12
11
11
11
10
11

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

1
-1
0
-0
-1
-2
-4
-5
-5
-6
-7
-8
-8
-10
-10
-10
-10
-9
-10
-9
-9
-9
-9
-9

Relative Humidity (%)

76
68
79
77
76
72
68
66
65
63
62
61
60
51
48
46
45
46
45
48
51
54
55
54

Pressure (mb)

997
997
997
997
997
999
1000
1001
1002
1004
1005
1006
1007
1008
1008
1008
1008
1008
1008
1009
1010
1010
1011
1011

Ozone (du)

345
347
340
336
329
327
329
325
324
325
325
323
325
330
329
331
333
332
332
330
329
327
327
330

Thursday 11

Third Quarter 44%

00:10

12:28

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 Good
10 OK
11 Bad
12 Bad
13 Bad
14 Bad
15 Bad
16 Bad
17 Bad
18 Bad
19 Bad
20 Bad

Sun - Rise: 07:14, Set: 16:36, Transit: 11:55. Moon - Rise: 00:10, Set: 12:28. Civil Dark: 17:07 - 06:44. Nautical Dark: 17:41 - 06:10. Astro Dark: 18:14 - 05:37

Total Clouds (% Sky Obscured)

76
75
69
68
77
66
55
49
36
35
30
25
4
27
51
76
77
75
78
78
82
87
100
100

Low Clouds (% Sky Obscured)

69
71
57
9
6
7
13
23
16
20
22
20
2
1
0
0
0
0
0
27
54
81
87
93

Medium Clouds (% Sky Obscured)

58
57
32
60
45
45
55
43
36
35
30
25
4
26
51
76
77
75
78
78
82
85
87
100

High Clouds (% Sky Obscured)

0
0
0
2
6
0
0
1
0
0
0
0
0
18
33
49
41
28
17
23
27
53
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
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
Snow

Precipitation Probability (%)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
2
35
54

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
0.2

Wind Speed/Direction (mph)

11
12
11
11
11
10
10
10
9
9
9
10
10
11
10
10
10
9
8
7
6
5
5
4

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

52
55
57
57
56
56
57
58
60
62
64
64
60
51
46
41
38
38
39
42
47
50
53
53

Pressure (mb)

1011
1012
1012
1012
1013
1013
1014
1014
1015
1016
1016
1017
1018
1018
1018
1017
1017
1017
1017
1017
1017
1017
1017
1017

Ozone (du)

333
334
334
331
330
330
324
322
323
323
326
326
327
327
328
325
325
326
330
336
345
348
348
346

Friday 12

Waning Crescent 34%

01:12

12:49

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
16 Bad
17 Bad
18 Bad
19 Bad
20 Bad

Sun - Rise: 07:15, Set: 16:37, Transit: 11:56. Moon - Rise: 01:12, Set: 12:49. Civil Dark: 17:07 - 06:44. Nautical Dark: 17:41 - 06:10. Astro Dark: 18:14 - 05:37

Total Clouds (% Sky Obscured)

100
100
100
100
97
96
95
93
94
95
85
75
64
73
77
87
86
83
73
64
54
90
95
100

Low Clouds (% Sky Obscured)

99
89
80
70
68
65
62
55
49
42
37
32
27
40
47
55
50
53
51
34
17
0
10
19

Medium Clouds (% Sky Obscured)

100
97
95
92
87
82
32
27
18
11
10
6
0
0
3
4
8
9
12
13
14
29
83
94

High Clouds (% Sky Obscured)

100
97
25
34
23
12
1
70
70
70
70
64
54
68
76
87
86
83
73
64
54
87
85
82

ISS Passover

Visibility (miles)

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

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

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

Precipitation Probability (%)

68
68
63
56
42
31
19
16
13
8
15
10
0
0
0
0
0
0
0
0
0
0
4
8

Precipitation Amount (mm)

0.3
0.3
0.2
0.2
0.1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

3
5
5
5
5
4
3
4
6
7
9
10
11
12
13
13
14
12
11
10
9
8
8
7

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

53
54
52
52
55
58
59
59
56
57
59
58
57
55
51
46
43
43
43
43
44
45
47
49

Pressure (mb)

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

Ozone (du)

349
355
360
356
355
357
354
346
340
335
334
329
324
320
315
311
307
307
307
306
307
307
307
307

Saturday 13

Waning Crescent 25%

02:13

13:10

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
16 OK
17 OK
18 Good
19 OK
20 OK

Sun - Rise: 07:15, Set: 16:37, Transit: 11:56. Moon - Rise: 02:13, Set: 13:10. Civil Dark: 17:07 - 06:45. Nautical Dark: 17:41 - 06:11. Astro Dark: 18:14 - 05:38

Total Clouds (% Sky Obscured)

96
97
93
94
85
70
45
32
30
27
26
25
28
37
61
64
58
47
35
28
19
9
21
33

Low Clouds (% Sky Obscured)

32
23
28
10
12
18
21
21
22
22
23
23
28
30
31
33
26
15
4
10
15
8
19
28

Medium Clouds (% Sky Obscured)

95
96
93
94
85
70
41
25
15
5
4
2
0
0
7
1
1
1
0
0
0
0
0
0

High Clouds (% Sky Obscured)

80
79
63
60
45
40
35
10
20
27
26
25
5
3
2
1
1
0
0
14
19
9
21
13

ISS Passover

Visibility (miles)

8
9
7
4
2
1
1
0
0
0
0
0
0
0
3
6
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
Snow
Snow
Snow
Snow
Snow
Snow
Snow
Snow
Snow
Snow
Snow
None
None
None
None
None
None
None
None
None

Precipitation Probability (%)

11
20
25
28
57
72
87
94
95
95
95
84
70
56
42
21
17
14
5
6
3
0
0
0

Precipitation Amount (mm)

0
0
0
0
0.2
0.4
0.5
0.6
0.7
0.8
0.6
0.5
0.4
0.2
0.1
0
0
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

7
6
6
6
7
7
7
8
7
7
7
7
8
10
10
11
13
13
13
13
12
12
11
10

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

-4
-4
-3
-4
-4
-4
-5
-5
-5
-5
-5
-6
-6
-5
-5
-5
-5
-5
-6
-7
-7
-7
-8
-11

Dew Point (°C)

-9
-9
-8
-7
-7
-5
-4
-3
-3
-3
-3
-3
-3
-3
-3
-3
-4
-4
-6
-7
-8
-8
-9
-10

Relative Humidity (%)

51
53
58
61
64
74
84
96
96
96
98
96
96
94
91
86
83
83
79
78
78
77
76
77

Pressure (mb)

1019
1019
1019
1019
1018
1018
1018
1018
1018
1018
1018
1018
1019
1019
1019
1018
1018
1019
1019
1020
1021
1022
1022
1023

Ozone (du)

307
307
308
308
309
310
311
313
316
319
322
325
327
329
334
339
343
342
341
340
347
354
361
363

Sunday 14

Waning Crescent 17%

03:14

13:34

21 OK
22 OK
23 OK
00 Good
01 Good
02 OK
03 OK
04 OK
05 OK
06 OK
07 OK
08 OK
09 OK
10 OK
11 OK
12 OK

Sun - Rise: 07:16, Set: 16:37, Transit: 11:57. Moon - Rise: 03:14, Set: 13:34. Civil Dark: 17:08 - 06:46. Nautical Dark: 17:42 - 06:12. Astro Dark: 18:14 - 05:39

Total Clouds (% Sky Obscured)

43
31
22
17
18
18
14
15
24
31
31
27
19
19
20
20

Low Clouds (% Sky Obscured)

30
18
9
2
3
6
8
15
24
31
31
27
19
19
19
0

Medium Clouds (% Sky Obscured)

0
4
8
13
13
14
14
15
23
25
30
27
19
19
15
20

High Clouds (% Sky Obscured)

0
0
0
0
0
0
0
1
2
2
31
27
19
19
20
15

ISS Passover

Visibility (miles)

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

Precipitation Type

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

Precipitation Amount (mm)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

77
77
75
74
72
72
72
72
73
73
75
75
75
74
74
73

Pressure (mb)

1023
1024
1024
1024
1025
1025
1026
1026
1027
1027
1028
1028
1029
1030
1029
1029

Ozone (du)

366
369
364
358
353
346
339
332
330
328
326
327
328
329
326
323

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

Generated: 08/12/25 20:17:14. Forecast: 08/12/25 to 14/12/25. Timezone: UTC-5.00