Unlock more jurisdiction sub-pages
Subscribe for full sub-page depth, saves, alerts, and exports.
Weather & Climate
Westmont, Pennsylvania, United States
Overview
Available climate summaries for Westmont. Origins and reference periods are unverified; stored values may include AI estimates. Treat these as estimates until independently verified.
Key Metrics
Annual Avg
9.2°C
Summer Avg
20.6°C
Winter Avg
-2.7°C
Record High
35°C
Record Low
-24.4°C
Annual Precipitation
1042.6 mm
Avg Humidity
80%
Summer Humidity
75%
Winter Humidity
88%
Monthly Averages
| Month | High (°C) | Avg (°C) | Low (°C) | Rain (mm) | Humidity (%) | Sunshine (h) | Wind (kph) |
|---|---|---|---|---|---|---|---|
| Jan | 17.6° | -3.9° | -24.1° | 68.8 | 88% | 51 | 32.5 |
| Feb | 21.1° | -3° | -24.4° | 66.1 | 88% | 69 | 37.9 |
| Mar | 24.7° | 1.9° | -18.3° | 79 | 83% | 107 | 36.2 |
| Apr | 27.5° | 8.5° | -7.2° | 87.9 | 79% | 138 | 32.1 |
| May | 32.9° | 14.5° | -4.9° | 105.4 | 79% | 162 | 24.4 |
| Jun | 34.2° | 19° | 2.9° | 105 | 79% | 175 | 19.8 |
| Jul | 34.7° | 21.6° | 7.2° | 99.2 | 74% | 181 | 16 |
| Aug | 35° | 21.2° | 8° | 90.5 | 71% | 160 | 16.4 |
| Sep | 33.6° | 17.5° | 2° | 99 | 72% | 126 | 21.2 |
| Oct | 30.9° | 10.4° | -6.2° | 89.6 | 78% | 89 | 25.5 |
| Nov | 23.6° | 4° | -13° | 68.7 | 82% | 60 | 28.4 |
| Dec | 20.9° | -1.3° | -16.6° | 83.4 | 88% | 42 | 29.2 |
Data sources
Estimates and unverified origins
Oyster List climate data - Climate origins are unverified. Available methods include historical APIs and AI estimates; stored rows do not identify the original dataset, reference period, or model for each value. Treat these summaries as estimates until independently verified. Record updated 2026-03-22.
Subscribe to unlock more jurisdiction sub-pages this month.
You can keep discovering Oyster publicly, but full multi-jurisdiction depth, tracking, alerts, and exports are part of paid access.