Weather for Downingtown, Pennsylvania
Current Weather
Five Day Weather Forecast
Wed
H: 48°F
L: 33°F
Thu
H: 40°F
L: 36°F
Fri
H: 39°F
L: 34°F
Sat
H: 47°F
L: 38°F
Sun
H: 35°F
L: 29°F
Air Quality
Nitrogen Dioxide: 13.45 μg/m3
Sulphur Dioxide: 9.45 μg/m3
Ozone: 62 μg/m3
Astronomical
Sun Transit: 12:16 AM
Sunset: 5:42 PM
Daylight: 10 hrs 50 mins
Moon Transit: 1:13 PM
Moonset: 7:12 PM
Moon Phase: New
Moon Illumination: 1.3%
Best Times for Fishing or Hunting
Major Periods
2:19 AM - 4:49 AM12:43 AM - 3:13 PM
Minor Periods
6:42 PM - 8:12 PM6:56 AM - 8:26 AM
Action Rating: 4 out of 5
Dense Fog Advisory issued February 17 at 1:15PM EST until February 18 at 10:00AM EST by NWS Mount Holly NJ
Effective: Tue February 17, 2026, 1:15 PM
Expires: Wed February 18, 2026, 6:00 AM
* WHAT...Visibility one quarter to one half mile in dense fog. * WHERE...Portions of Delaware, northeast Maryland, New Jersey, and southeast Pennsylvania. * WHEN...From 10 PM this evening to 10 AM EST Wednesday. * IMPACTS...Low visibility could make driving conditions hazardous.
If driving, slow down, use your headlights, and leave plenty of distance ahead of you.
Air Quality Alert issued February 17 at 3:45PM EST by NWS Mount Holly NJ
Non-Weather Emergency Message. Not sent to IPAWS.
Effective: Tue February 17, 2026, 3:45 PM
Expires: Thu February 19, 2026, 12:00 AM
The Delaware Valley Regional Planning Commission has issued a code orange air quality alert Wednesday for The Philadelphia Metro area. A code orange air quality alert means that air pollution concentrations within the region may become unhealthy for sensitive groups. Sensitive groups include children...people suffering from asthma... heart disease or other lung diseases...and the elderly. The effects of air pollution can be minimized by avoiding strenuous activity or exercise outdoors. For more information on ground-level ozone and fine particles...visit http://www.phila.gov/health/units/ams/
Dense Fog Advisory issued February 18 at 7:19AM EST until February 18 at 10:00AM EST by NWS Mount Holly NJ
Effective: Wed February 18, 2026, 7:19 AM
Expires: Wed February 18, 2026, 10:00 AM
* WHAT...Visibility one quarter mile or less in dense fog. Patchy ice. * WHERE...Portions of northern Delaware, northeast Maryland, central, northern, northwest, and southern New Jersey, and east central, northeast, and southeast Pennsylvania. * WHEN...Until 10 AM EST this morning. * IMPACTS...Low visibility could make driving conditions hazardous. Patchy freezing fog could result in icy roads.
If driving, slow down, use your headlights, and leave plenty of distance ahead of you.
Dense Fog Advisory issued February 18 at 12:51AM EST until February 18 at 10:00AM EST by NWS Baltimore MD/Washington DC
Effective: Wed February 18, 2026, 12:51 AM
Expires: Wed February 18, 2026, 9:00 AM
* WHAT...Visibility one quarter mile or less in dense fog. * WHERE...Cecil, Northern Baltimore, Northwest Harford, Southeast Harford, and Southern Baltimore Counties. * WHEN...Until 10 AM EST this morning. * IMPACTS...Low visibility could make driving conditions hazardous.
If driving, slow down, use your headlights, and leave plenty of distance ahead of you.
Dense Fog Advisory issued February 18 at 6:23AM EST until February 18 at 10:00AM EST by NWS Baltimore MD/Washington DC
Effective: Wed February 18, 2026, 6:23 AM
Expires: Wed February 18, 2026, 10:00 AM
* WHAT...Visibility one quarter mile or less in dense fog. * WHERE...Anne Arundel, Central and Southeast Howard, Northwest Howard, Carroll, Cecil, Northern Baltimore, Northwest Harford, Southeast Harford, and Southern Baltimore Counties. * WHEN...Until 10 AM EST this morning. * IMPACTS...Low visibility could make driving conditions hazardous.
If driving, slow down, use your headlights, and leave plenty of distance ahead of you.
Weather Forecast
Air Quality
Nitrogen Dioxide: 37.83 μg/m3
Sulphur Dioxide: 8.37 μg/m3
Ozone: 26.36 μg/m3
Astronomical
Sun Transit: 12:16 AM
Sunset: 5:42 PM
Daylight: 10 hrs 50 mins
Moon Transit: 1:13 PM
Moonset: 7:12 PM
Moon Phase: New
Moon Illumination: 1.3%
Best Times for Fishing or Hunting
Major Periods
2:19 AM - 4:49 AM12:43 AM - 3:13 PM
Minor Periods
6:42 PM - 8:12 PM6:56 AM - 8:26 AM
Action Rating: 4 out of 5
Weather Forecast
Air Quality
Nitrogen Dioxide: 29.7 μg/m3
Sulphur Dioxide: 8 μg/m3
Ozone: 34.2 μg/m3
Astronomical
Sun Transit: 12:16 AM
Sunset: 5:43 PM
Daylight: 10 hrs 53 mins
Moon Transit: 2:00 PM
Moonset: 8:22 PM
Moon Phase: Waxing Crescent
Moon Illumination: 5.2%
Best Times for Fishing or Hunting
Major Periods
3:37 PM - 6:07 PM1:30 PM - 4:00 PM
Minor Periods
7:52 PM - 9:22 PM7:19 AM - 8:49 AM
Action Rating: 4 out of 5
Weather Forecast
Air Quality
Nitrogen Dioxide: 22.93 μg/m3
Sulphur Dioxide: 4.69 μg/m3
Ozone: 46.44 μg/m3
Astronomical
Sun Transit: 12:16 AM
Sunset: 5:44 PM
Daylight: 10 hrs 55 mins
Moon Transit: 2:46 PM
Moonset: 9:32 PM
Moon Phase: Waxing Crescent
Moon Illumination: 11.3%
Best Times for Fishing or Hunting
Major Periods
3:50 AM - 6:20 AM2:16 PM - 4:46 PM
Minor Periods
9:02 PM - 10:32 PM7:42 AM - 9:12 AM
Action Rating: 3 out of 5
Weather Forecast
Air Quality
Nitrogen Dioxide: 20.99 μg/m3
Sulphur Dioxide: 6.47 μg/m3
Ozone: 40.48 μg/m3
Astronomical
Sun Transit: 12:16 AM
Sunset: 5:46 PM
Daylight: 10 hrs 58 mins
Moon Transit: 3:34 PM
Moonset: 10:46 PM
Moon Phase: Waxing Crescent
Moon Illumination: 19.4%
Best Times for Fishing or Hunting
Major Periods
4:38 AM - 7:08 AM3:04 PM - 5:34 PM
Minor Periods
10:16 PM - 11:46 PM8:08 AM - 9:38 AM
Action Rating: 4 out of 5
Weather Forecast
Air Quality
Nitrogen Dioxide: 32.53 μg/m3
Sulphur Dioxide: 6.91 μg/m3
Ozone: 33.31 μg/m3
Astronomical
Sun Transit: 12:16 AM
Sunset: 5:47 PM
Daylight: 11 hrs mins
Moon Transit: 4:27 PM
Moonset: 12:01 PM
Moon Phase: Waxing Crescent
Moon Illumination: 29.1%
Best Times for Fishing or Hunting
Major Periods
5:30 AM - 8:00 AM3:57 PM - 6:27 PM
Minor Periods
12:00 AM - 12:00 AM8:36 AM - 10:06 AM
Action Rating: 2 out of 5