Temperature
Cold by day, cold at night.
Berwyn is usually most comfortable in September and October. Typical daytime highs range from 32–83°F across the year. Rain varies by season.

Cold by day, cold at night.
Several rainy days. About 9 wet days this month.
A mix of sunshine and cloud.
Humidity is rarely noticeable in the cool air.
In November, afternoons feel about 37° and nights feel near 29°.
Mostly cloudy skies this month.
Breezy November days can feel brisker in open spots.
November late afternoons are around 45°F, easing to about 43°F in early evening.
| Month | High°F | Low°F | Rainin | Wet days | Sunh | Humidity% |
|---|---|---|---|---|---|---|
| Jan | 32 | 20 | 2.4 | 9 | 5.6 | 75 |
| Feb | 35 | 23 | 2.1 | 7 | 7.0 | 73 |
| Mar | 45 | 31 | 2.8 | 10 | 8.5 | 70 |
| Apr | 57 | 42 | 4.4 | 12 | 9.2 | 67 |
| May | 69 | 53 | 4.4 | 13 | 10.6 | 69 |
| Jun | 79 | 64 | 4.0 | 12 | 11.9 | 70 |
| Jul | 83 | 68 | 3.6 | 11 | 12.3 | 71 |
| Aug | 81 | 67 | 3.7 | 11 | 11.5 | 73 |
| Sep | 74 | 59 | 3.0 | 9 | 9.9 | 72 |
| Oct | 62 | 48 | 3.3 | 9 | 8.0 | 70 |
| Nov | 48 | 36 | 2.8 | 9 | 6.0 | 70 |
| Dec | 37 | 26 | 2.4 | 9 | 5.3 | 75 |
Similar climates
Want a side-by-side climate view? Compare Berwyn with New York City.
Typical monthly values are based on long-term climate records. Useful for planning, not a forecast. Check the weather before you travel.
Sunshine: source type is not yet identified at metric level.
Local microclimates can vary by beach, neighborhood, trail, or elevation.
Last updated: Aug 27, 2026
Data & methodology