Clear Outside v1.0 - International Weather Forecasts For Astronomers

Friday 19

New Moon 1%

08:08

16:56

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

Sun - Rise: 07:19, Set: 16:39, Transit: 11:59. Moon - Rise: 08:08, Set: 16:56. Civil Dark: 17:10 - 06:48. Nautical Dark: 17:44 - 06:14. Astro Dark: 18:17 - 05:41

Total Clouds (% Sky Obscured)

34
27
27
2
2
3
11
45
46
1
0
2
29
3
4
15
59
95
100
100
100
6
14
50

Low Clouds (% Sky Obscured)

34
24
5
2
2
3
3
3
2
0
0
2
0
0
0
0
0
0
0
0
0
0
0
0

Medium Clouds (% Sky Obscured)

0
0
0
0
0
0
5
10
28
0
0
0
0
0
0
0
16
38
64
65
7
6
6
4

High Clouds (% Sky Obscured)

0
0
0
0
0
0
2
30
22
1
0
0
29
3
4
15
52
92
100
100
98
0
14
50

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)

21
18
18
16
15
14
12
11
10
8
8
8
8
8
7
5
6
6
6
6
5
5
5
5

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

56
53
50
47
47
48
48
48
49
50
52
52
52
51
50
46
43
42
39
38
39
41
46
49

Pressure (mb)

1009
1011
1012
1014
1015
1016
1017
1019
1020
1020
1021
1023
1024
1024
1025
1026
1025
1024
1023
1022
1022
1021
1021
1021

Ozone (du)

330
320
316
312
307
300
297
297
298
299
297
293
293
291
290
290
289
288
289
288
289
290
288
285

Saturday 20

Waxing Crescent 3%

08:53

17:58

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

Sun - Rise: 07:19, Set: 16:40, Transit: 12:00. Moon - Rise: 08:53, Set: 17:58. Civil Dark: 17:10 - 06:49. Nautical Dark: 17:44 - 06:15. Astro Dark: 18:17 - 05:42

Total Clouds (% Sky Obscured)

44
9
25
82
98
56
35
28
25
62
71
77
97
100
100
100
41
38
100
67
8
1
1
0

Low Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
26
27
8
1
1
0

Medium Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
14
42
71
77
97
100
100
92
41
38
12
0
0
0
0
0

High Clouds (% Sky Obscured)

44
7
23
79
98
56
35
28
7
5
45
27
48
100
100
100
35
28
100
67
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 (%)

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
15
1
4
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)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

50
56
60
65
70
71
64
61
64
63
63
62
66
65
57
54
46
47
46
41
42
43
45
43

Pressure (mb)

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

Ozone (du)

284
283
282
281
280
280
280
280
279
278
279
280
280
280
281
283
286
289
293
296
299
305
313
318

Sunday 21

Waxing Crescent 7%

09:31

19:03

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

Sun - Rise: 07:20, Set: 16:40, Transit: 12:00. Moon - Rise: 09:31, Set: 19:03. Civil Dark: 17:11 - 06:49. Nautical Dark: 17:45 - 06:15. Astro Dark: 18:18 - 05:42

Total Clouds (% Sky Obscured)

0
1
0
0
0
1
1
1
0
0
0
0
0
0
20
32
25
34
39
43
39
38
41
44

Low Clouds (% Sky Obscured)

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

Medium Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
14
8
25
11
11
9
9
38
41
44

High Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
8
15
9
10
8
10
3
5
5

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)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

45
47
48
47
48
48
47
48
51
52
53
54
54
56
53
49
44
41
39
39
39
42
44
46

Pressure (mb)

1027
1028
1029
1029
1030
1030
1031
1032
1032
1032
1033
1033
1034
1034
1035
1035
1035
1033
1033
1032
1032
1032
1032
1032

Ozone (du)

322
323
325
324
323
324
324
326
324
321
314
310
307
307
307
310
308
304
304
304
304
303
302
300

Monday 22

Waxing Crescent 13%

10:02

19:03

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
16 Bad
17 Bad
18 Bad

Sun - Rise: 07:20, Set: 16:41, Transit: 12:01. 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)

62
82
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)

10
30
4
51
58
67
65
51
40
35
20
20
50
73
100
100
100
100
100
100
100
99
98
96

Medium Clouds (% Sky Obscured)

62
82
100
100
100
100
100
100
100
100
100
100
100
100
99
99
84
89
63
43
11
7
3
0

High Clouds (% Sky Obscured)

0
0
0
33
64
100
87
73
62
72
84
93
91
90
89
75
64
51
54
69
77
86
94
74

ISS Passover

Visibility (miles)

9
2
5
9
9
9
3
5
2
1
2
0
0
0
0
0
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
Snow
Snow
Snow
Snow
Snow
Snow
Very Light Rain
None
None
None
None
None
None
None
None
None

Precipitation Probability (%)

19
28
2
1
2
5
21
30
48
47
45
61
65
68
64
51
37
12
10
6
7
1
1
1

Precipitation Amount (mm)

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

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

-10
-10
-9
-9
-9
-10
-9
-9
-8
-6
-3
-2
-1
0
1
1
1
2
2
2
3
3
3
4

Relative Humidity (%)

46
47
49
49
49
47
48
48
52
59
80
89
96
98
98
98
96
96
96
94
94
93
93
93

Pressure (mb)

1033
1032
1032
1031
1031
1030
1030
1029
1028
1027
1026
1025
1024
1023
1023
1022
1020
1019
1017
1017
1017
1016
1016
1016

Ozone (du)

298
298
297
295
293
293
291
291
290
288
289
290
293
294
298
300
300
298
299
300
299
301
302
304

Tuesday 23

Waxing Crescent 21%

10:29

20:09

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

Sun - Rise: 07:21, Set: 16:41, Transit: 12:01. Moon - Rise: 10:29, Set: 20:09. Civil Dark: 17:12 - 06:50. Nautical Dark: 17:46 - 06:16. Astro Dark: 18:19 - 05:43

Total Clouds (% Sky Obscured)

99
99
99
99
100
100
99
99
99
98
59
71
51
32
13
12
17
16
30
39
34
38
41
90

Low Clouds (% Sky Obscured)

92
88
85
85
85
86
86
86
86
77
59
59
51
32
13
12
17
16
20
12
0
0
0
0

Medium Clouds (% Sky Obscured)

0
0
1
2
0
0
6
12
20
22
22
24
20
11
0
0
0
0
0
0
0
0
0
0

High Clouds (% Sky Obscured)

98
95
79
88
31
55
92
56
66
56
8
46
35
19
0
1
1
2
24
39
34
38
41
90

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 (%)

1
3
3
1
1
1
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
7
7
7
7
7
9
9
10
10
9
9
8
8
8
8
8
9
9
7
6
5
4
4

Chance of Frost

Temperature (°C)

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

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

93
94
94
94
91
88
78
74
74
71
69
75
76
72
68
65
61
57
54
56
59
60
65
68

Pressure (mb)

1017
1017
1017
1017
1017
1017
1018
1019
1020
1021
1021
1023
1024
1025
1026
1027
1027
1027
1027
1028
1028
1029
1029
1030

Ozone (du)

306
307
307
306
304
301
301
300
300
299
299
297
296
296
295
294
292
289
287
286
284
283
284
285

Wednesday 24

Waxing Crescent 30%

10:53

21:15

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
16 Bad
17 Bad
18 Bad

Sun - Rise: 07:21, Set: 16:42, Transit: 12:02. Moon - Rise: 10:53, 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)

97
100
100
99
94
89
87
90
100
100
100
100
100
100
100
100
100
100
97
93
89
92
96
100

Low Clouds (% Sky Obscured)

0
0
0
1
5
3
11
20
26
46
67
87
84
80
78
67
56
45
44
41
38
53
86
97

Medium Clouds (% Sky Obscured)

17
33
49
65
81
89
87
90
100
100
99
98
91
84
76
84
78
30
15
5
0
0
0
0

High Clouds (% Sky Obscured)

93
97
100
95
78
62
65
81
100
100
100
100
93
83
75
65
46
35
45
50
80
92
96
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
Very Light Rain
Very Light Rain
None
None
None
None
None
None
None
None
None

Precipitation Probability (%)

0
0
0
0
0
0
0
1
2
29
44
44
49
55
62
50
39
16
14
11
0
2
1
3

Precipitation Amount (mm)

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

Wind Speed/Direction (mph)

3
3
3
3
1
1
3
3
3
4
4
5
5
6
6
6
7
7
7
5
5
4
4
4

Chance of Frost

Temperature (°C)

3
3
3
2
2
2
2
2
2
2
2
3
3
3
3
3
4
4
5
5
5
6
5
5

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

73
73
73
74
73
72
70
73
74
77
77
79
79
82
82
85
85
86
86
86
86
88
88
88

Pressure (mb)

1030
1030
1030
1030
1030
1030
1030
1029
1029
1028
1028
1027
1027
1027
1026
1026
1024
1022
1021
1020
1020
1019
1019
1019

Ozone (du)

286
288
289
290
291
293
294
295
296
297
295
293
292
291
291
290
288
287
285
284
283
282
280
279

Thursday 25

Waxing Crescent 41%

11:15

22:22

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

Sun - Rise: 07:21, Set: 16:43, Transit: 12:02. Moon - Rise: 11:15, Set: 22:22. Civil Dark: 17:13 - 06:51. Nautical Dark: 17:47 - 06:17. Astro Dark: 18:20 - 05:44

Total Clouds (% Sky Obscured)

98
95
93
95
98
100
100
99
99
100
100
100
100
100
100
100
100
100

Low Clouds (% Sky Obscured)

94
89
80
81
81
80
69
62
55
53
54
49
36
22
8
31
53
76

Medium Clouds (% Sky Obscured)

0
4
7
14
12
11
29
47
65
69
72
74
81
87
94
94
97
96

High Clouds (% Sky Obscured)

96
95
93
94
94
97
81
64
46
64
82
100
100
100
100
100
100
100

ISS Passover

Visibility (miles)

9
9
9
9
9
9
9
9
9
9
7
5
3
2
1
0
3
6

Fog (%)

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

Precipitation Probability (%)

3
2
1
6
11
13
11
7
3
14
21
25
43
46
52
58
60
62

Precipitation Amount (mm)

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

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

6
6
6
6
6
6
6
6
6
6
6
6
6
7
8
9
10
12

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

90
90
90
91
93
93
94
94
94
96
96
96
98
98
98
98
96
96

Pressure (mb)

1019
1019
1019
1018
1018
1017
1017
1016
1016
1015
1015
1014
1013
1013
1012
1012
1011
1009

Ozone (du)

278
276
273
271
268
266
264
264
264
264
263
262
261
262
262
263
264
264

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

Generated: 19/12/25 19:13:03. Forecast: 19/12/25 to 25/12/25. Timezone: UTC-5.00