Norristown Climate by Month
Norristown, Pennsylvania, United States
Hot summers and cold winters, with rain spread through the year.
The climate in Norristown is one of hot summers and cold winters, with rain spread through the year. Expect highs of 87°F (31°C) in July and 40°F (5°C) in January, with the coldest nights (January) near 24°F (-4°C). It gets 43 in (1099 mm) of rain a year, spread across the months.
- Warmest month
- 87°F(31°C)
- Average high, July
- Coldest nights
- 24°F(-4°C)
- Average low, January
- Rain per year
- 43 in(1099 mm)
- No clear rainy season
- Humidity
- 64%
- Sunniest: July
Best and worst months in Norristown
Best for weatherMay is the best time for weather in Norristown: highs near 74°F (23°C) and about 3.6 in (92 mm) of rain a month.
Least pleasantJanuary is the least pleasant month: it's the coldest, with highs of only 40°F (5°C).
Comfort combines how close the afternoon high is to 75°F (24°C) with how much rain falls and how humid it is. See where the weather is best in May.
Temperature and rain through the year
Highs and lows (°F)
Average highAverage low
Rain (in per month)
Norristown weather by month
| Month | High | Low | Rain | Humidity | Sun |
|---|---|---|---|---|---|
| JanJanuary | 40°F(5°C) | 24°F(-4°C) | 3.2 in(82 mm) | 65% | 1.8 |
| FebFebruary | 43°F(6°C) | 25°F(-4°C) | 2.8 in(71 mm) | 60% | 2.8 |
| MarMarch | 52°F(11°C) | 32°F(0°C) | 3.7 in(94 mm) | 55% | 3.6 |
| AprApril | 64°F(18°C) | 42°F(5°C) | 3.5 in(88 mm) | 59% | 4.6 |
| MayMayBest | 74°F(23°C) | 52°F(11°C) | 3.6 in(92 mm) | 61% | 5.4 |
| JunJune | 83°F(28°C) | 61°F(16°C) | 3.9 in(100 mm) | 67% | 5.7 |
| JulJuly | 87°F(31°C) | 67°F(19°C) | 4.2 in(106 mm) | 66% | 5.7 |
| AugAugust | 86°F(30°C) | 65°F(18°C) | 3.9 in(98 mm) | 67% | 5.0 |
| SepSeptember | 80°F(26°C) | 57°F(14°C) | 4.2 in(106 mm) | 67% | 4.1 |
| OctOctober | 67°F(20°C) | 46°F(8°C) | 3.3 in(83 mm) | 64% | 2.9 |
| NovNovember | 56°F(14°C) | 36°F(2°C) | 3.2 in(82 mm) | 65% | 2.1 |
| DecDecember | 46°F(8°C) | 29°F(-2°C) | 3.8 in(97 mm) | 67% | 1.6 |
1991–2020 averages. Sun is solar radiation in kWh/m² per day. Highlighted: the most comfortable months.
Places with a similar climate
All 20 places like Norristown →- 🇺🇸LancasterPennsylvania, United States · Pop. 59k99%matchSame winter lowsSame summer highsNorristown vs Lancaster →
- 🇺🇸HarrisburgPennsylvania, United States · Pop. 50k99%matchSame summer highsSame winter lowsNorristown vs Harrisburg →
- 🇺🇸SayrevilleNew Jersey, United States · Pop. 45k99%matchSame winter lowsSame summer highsNorristown vs Sayreville →
- 🇺🇸New York CityNew York, United States · Pop. 8.8M99%matchSame humiditySame sunshineNorristown vs New York City →
- 🇺🇸FrederickMaryland, United States · Pop. 69k99%matchSame winter lowsSame summer highsNorristown vs Frederick →