Clear Outside v1.0 - International Weather Forecasts For Astronomers

Tuesday 21

Waxing Crescent 26%

09:06

01:16

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

Sun - Rise: 06:13, Set: 19:46, Transit: 12:59. Moon - Rise: 09:06, Set: 01:16. Civil Dark: 20:14 - 05:45. Nautical Dark: 20:49 - 05:10. Astro Dark: 21:25 - 04:34

Total Clouds (% Sky Obscured)

3
1
3
0
2
4
0
3
3
2
8
29
57
42
42
86
74
84
86
98
68
100
100
100

Low Clouds (% Sky Obscured)

3
0
0
0
0
0
0
0
0
0
4
11
11
0
42
23
30
20
24
23
19
3
45
55

Medium Clouds (% Sky Obscured)

0
0
0
0
0
0
0
0
0
0
2
22
48
42
42
78
74
84
33
46
20
100
100
100

High Clouds (% Sky Obscured)

0
0
0
0
1
2
0
1
1
2
2
1
0
0
0
0
0
0
0
3
39
5
69
79

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
1
3
5
5
30
8

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

Chance of Frost

Temperature (°C)

0
0
-1
1
1
3
5
6
8
9
11
12
12
13
13
12
12
11
10
9
8
8
7
7

Feels Like (°C)

-3
-2
-3
-1
-1
0
2
4
6
7
9
10
10
10
9
8
8
6
5
4
4
3
3
4

Dew Point (°C)

-12
-12
-13
-11
-11
-12
-14
-14
-13
-12
-12
-11
-10
-9
-8
-7
-6
-5
-5
-4
-2
-1
-0
1

Relative Humidity (%)

39
39
39
40
38
32
25
22
21
20
20
19
19
20
23
26
29
32
35
41
51
56
59
65

Pressure (mb)

1028
1028
1029
1029
1030
1031
1031
1030
1029
1028
1028
1027
1026
1025
1024
1024
1024
1024
1024
1024
1024
1023
1023
1021

Ozone (du)

402
404
402
398
394
391
390
390
390
387
385
385
384
383
379
374
374
372
374
376
375
373
372
373

Wednesday 22

Waxing Crescent 37%

10:16

02:06

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 OK
19 OK
20 OK
21 OK
22 Good
23 OK
00 Bad
01 Bad
02 Bad

Sun - Rise: 06:12, Set: 19:47, Transit: 12:59. Moon - Rise: 10:16, Set: 02:06. Civil Dark: 20:15 - 05:43. Nautical Dark: 20:50 - 05:09. Astro Dark: 21:27 - 04:32

Total Clouds (% Sky Obscured)

100
100
100
100
100
100
100
100
100
98
79
85
96
99
72
23
44
41
31
18
42
56
71
86

Low Clouds (% Sky Obscured)

50
50
65
72
50
82
88
100
100
95
74
78
93
97
54
23
44
41
31
16
23
30
65
78

Medium Clouds (% Sky Obscured)

100
100
100
100
100
100
95
99
89
20
2
4
8
18
16
0
0
0
0
2
20
24
21
10

High Clouds (% Sky Obscured)

83
100
100
100
82
100
100
79
50
45
45
40
0
0
0
0
0
0
0
0
0
0
0
0

ISS Passover

Visibility (miles)

9
9
9
9
9
9
5
4
7
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
Very Light Rain
Light Rain
Light Rain
Light Rain
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None

Precipitation Probability (%)

16
22
18
38
73
95
95
69
29
5
2
0
0
0
0
0
0
0
0
0
0
0
0
0

Precipitation Amount (mm)

0
0
0
0
0.3
1
1.2
0.4
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

9
9
9
7
5
7
5
4
4
3
2
3
5
5
5
4
3
3
2
2
2
2
1
1

Chance of Frost

Temperature (°C)

8
8
8
9
9
9
9
9
9
10
10
12
13
14
14
15
14
13
13
12
12
11
11
11

Feels Like (°C)

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

Dew Point (°C)

1
2
2
2
3
3
5
6
7
6
7
8
9
10
10
10
10
10
9
9
9
9
9
9

Relative Humidity (%)

64
65
64
64
64
63
74
82
84
78
78
77
77
74
75
73
75
78
79
79
83
87
88
85

Pressure (mb)

1020
1020
1019
1018
1018
1018
1018
1017
1017
1017
1017
1016
1016
1015
1015
1015
1015
1016
1016
1016
1016
1016
1016
1016

Ozone (du)

376
373
371
372
372
375
376
376
376
374
374
372
372
373
369
368
368
366
366
367
366
364
364
364

Thursday 23

First Quarter 49%

11:30

02:44

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

Sun - Rise: 06:10, Set: 19:48, Transit: 12:59. Moon - Rise: 11:30, Set: 02:44. Civil Dark: 20:17 - 05:42. Nautical Dark: 20:51 - 05:07. Astro Dark: 21:28 - 04:30

Total Clouds (% Sky Obscured)

72
80
76
81
84
38
29
47
16
32
66
16
14
28
14
27
58
76
83
85
60
37
14
24

Low Clouds (% Sky Obscured)

58
65
76
80
83
38
29
47
13
0
0
0
0
0
0
0
0
0
0
0
0
10
10
10

Medium Clouds (% Sky Obscured)

20
21
0
0
0
0
0
0
0
0
0
0
0
0
0
3
7
75
83
77
60
37
14
24

High Clouds (% Sky Obscured)

0
0
0
2
2
1
0
8
7
30
66
16
14
23
13
27
57
64
70
74
52
31
3
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
13
4
5
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)

2
2
2
2
2
3
4
6
7
8
9
9
10
10
10
8
5
4
4
6
7
6
6
5

Chance of Frost

Temperature (°C)

11
10
10
10
10
12
14
16
18
19
21
21
22
22
22
22
20
18
17
16
15
14
13
13

Feels Like (°C)

10
12
11
10
10
10
14
17
17
18
19
18
18
18
18
20
19
18
15
13
12
11
10
10

Dew Point (°C)

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

Relative Humidity (%)

85
91
93
95
88
83
71
63
51
45
41
37
37
38
40
41
46
52
53
56
57
56
54
54

Pressure (mb)

1015
1015
1016
1016
1016
1016
1016
1016
1016
1015
1014
1014
1013
1012
1012
1012
1012
1012
1012
1013
1013
1013
1013
1012

Ozone (du)

363
361
362
364
366
366
365
365
365
366
365
364
363
363
362
361
359
358
359
359
360
361
360
360

Friday 24

Waxing Gibbous 60%

12:43

No Set

03 OK
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
02 Bad

Sun - Rise: 06:09, Set: 19:49, Transit: 12:59. Moon - Rise: 12:43, Set: No Set. Civil Dark: 20:18 - 05:40. Nautical Dark: 20:52 - 05:05. Astro Dark: 21:29 - 04:28

Total Clouds (% Sky Obscured)

38
54
75
85
92
93
89
84
86
88
92
73
74
59
56
79
86
89
92
94
96
98
100
96

Low Clouds (% Sky Obscured)

30
40
57
70
84
83
76
70
61
43
34
23
25
11
13
22
32
27
15
6
17
29
40
47

Medium Clouds (% Sky Obscured)

38
54
75
65
29
34
31
23
33
30
48
48
42
37
40
46
49
57
69
81
89
95
100
89

High Clouds (% Sky Obscured)

0
0
1
3
4
4
3
4
2
1
0
2
4
5
16
52
60
60
29
73
77
77
62
38

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
Very Light Rain
Light Rain

Precipitation Probability (%)

0
0
0
0
1
5
23
4
4
3
0
0
0
0
2
3
4
10
10
2
28
41
57
75

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
0.3
0.4

Wind Speed/Direction (mph)

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

Chance of Frost

Temperature (°C)

13
12
12
12
12
12
12
13
13
14
14
15
17
17
18
17
16
14
14
14
13
12
12
11

Feels Like (°C)

10
9
9
9
9
9
9
11
11
11
12
13
15
15
16
16
14
12
12
12
11
10
10
10

Dew Point (°C)

3
2
2
2
2
2
3
4
5
6
6
6
6
6
7
6
6
6
6
5
5
6
7
7

Relative Humidity (%)

51
49
49
51
52
50
51
56
55
57
57
54
45
49
48
49
51
56
57
56
59
64
70
72

Pressure (mb)

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

Ozone (du)

359
359
359
360
362
365
368
369
369
370
370
371
370
371
371
369
367
366
365
365
365
363
362
363

Saturday 25

Waxing Gibbous 71%

13:54

03:15

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
02 Bad

Sun - Rise: 06:07, Set: 19:50, Transit: 12:59. Moon - Rise: 13:54, Set: 03:15. Civil Dark: 20:19 - 05:39. Nautical Dark: 20:54 - 05:04. Astro Dark: 21:31 - 04:27

Total Clouds (% Sky Obscured)

93
90
94
97
99
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100

Low Clouds (% Sky Obscured)

54
61
59
57
55
69
83
97
98
99
100
99
98
97
97
98
99
97
94
92
92
93
94
94

Medium Clouds (% Sky Obscured)

77
70
79
86
90
94
96
78
62
60
65
0
10
10
17
20
13
42
71
100
99
97
96
93

High Clouds (% Sky Obscured)

72
76
79
89
95
87
74
75
81
91
100
91
82
74
83
91
100
100
100
100
100
100
100
100

ISS Passover

Visibility (miles)

8
2
1
2
4
4
2
4
4
9
9
8
8
7
7
8
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

Light Rain
Moderate Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
None
Very 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
Light Rain

Precipitation Probability (%)

95
95
95
95
95
95
95
95
73
41
55
85
94
95
92
89
86
95
95
95
95
95
95
95

Precipitation Amount (mm)

0.9
2.6
2.3
1.2
1.6
1.8
1.4
0.6
0.4
0
0.2
0.5
0.7
0.7
0.6
0.5
0.5
0.6
0.8
1
1
1.6
1.6
1.2

Wind Speed/Direction (mph)

4
5
5
7
7
7
7
8
8
9
9
9
9
9
8
8
8
8
8
7
7
7
7
7

Chance of Frost

Temperature (°C)

11
10
10
10
10
9
10
10
10
10
10
10
8
8
8
8
8
7
7
7
7
7
7
7

Feels Like (°C)

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

Dew Point (°C)

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

Relative Humidity (%)

80
90
93
95
95
91
95
93
95
93
90
91
91
91
93
91
91
91
91
91
93
91
91
93

Pressure (mb)

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

Ozone (du)

364
363
361
361
360
359
361
362
362
361
361
360
360
359
359
358
358
358
359
360
361
361
361
360

Sunday 26

Waxing Gibbous 80%

15:01

03:41

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

Sun - Rise: 06:06, Set: 19:51, Transit: 12:59. Moon - Rise: 15:01, Set: 03:41. Civil Dark: 20:20 - 05:37. Nautical Dark: 20:55 - 05:02. Astro Dark: 21:32 - 04:25

Total Clouds (% Sky Obscured)

100
100
100
100
100
100
100
100
98
79
52
45
17
17
31
48
65
72
78
81
86
83
88
83

Low Clouds (% Sky Obscured)

94
95
97
98
100
100
100
100
98
79
52
45
17
17
31
46
64
71
78
81
86
83
85
70

Medium Clouds (% Sky Obscured)

91
89
91
94
100
98
95
93
64
14
5
0
0
0
0
0
0
0
0
0
1
1
3
2

High Clouds (% Sky Obscured)

100
100
100
100
100
87
74
40
19
5
0
0
0
0
0
1
3
2
2
0
2
1
2
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

Light Rain
Light Rain
Very Light Rain
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None

Precipitation Probability (%)

95
68
52
35
11
7
4
0
1
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Precipitation Amount (mm)

0.8
0.4
0.2
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
7
7
7
7
7
7
8
8
8
8
8
8
8
8
7
6
5
5
4
4
3
4
4

Chance of Frost

Temperature (°C)

7
7
7
7
7
7
8
9
11
12
13
15
15
15
15
15
14
13
12
11
10
10
10
10

Feels Like (°C)

4
5
4
4
4
5
5
5
5
6
6
7
14
14
13
14
14
14
9
9
9
8
9
8

Dew Point (°C)

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

Relative Humidity (%)

93
93
93
90
88
87
73
60
51
45
40
35
33
34
33
36
39
43
46
50
54
57
60
62

Pressure (mb)

1013
1013
1013
1014
1014
1015
1015
1015
1016
1016
1016
1016
1016
1017
1017
1017
1018
1018
1019
1020
1020
1021
1021
1021

Ozone (du)

362
364
365
367
369
371
375
379
383
383
383
383
382
380
379
379
380
380
378
376
374
375
375
375

Monday 27

Waxing Gibbous 88%

16:06

04:04

Sun - Rise: 06:05, Set: 19:52, Transit: 12:58. Moon - Rise: 16:06, Set: 04:04. Civil Dark: 20:21 - 05:36. Nautical Dark: 20:56 - 05:01. Astro Dark: 21:34 - 04:23

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

Generated: 21/04/26 03:16:25. Forecast: 21/04/26 to 27/04/26. Timezone: UTC-4.00