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Brookhaven Weather by Month
Average temperatures, rainfall and humidity for Brookhaven, United States, month by month, built from OpenWeather’s historical records. Use it to see what a typical Brookhaven month looks like before you travel — then check the live Brookhaven forecast for the days ahead.
Warmest month
July
28°C average high
Coolest month
January
-4°C average low
Wettest month
July
97 mm of rain
Driest month
February
48 mm of rain
Average temperature and rainfall in Brookhaven by month
Averages of the daily highs and lows recorded in each month, with total rainfall, mean humidity and mean wind speed.
| Month | Avg high | Avg low | Record low / high | Rainfall | Humidity | Wind |
|---|---|---|---|---|---|---|
| January | 4°C | -4°C | -19°C / 18°C | 58 mm | 68% | 14 km/h |
| February | 5°C | -3°C | -20°C / 19°C | 48 mm | 69% | 14 km/h |
| March | 9°C | 1°C | -15°C / 24°C | 70 mm | 64% | 15 km/h |
| April | 15°C | 6°C | -6°C / 31°C | 80 mm | 66% | 15 km/h |
| May | 20°C | 11°C | 0°C / 34°C | 92 mm | 70% | 12 km/h |
| June | 25°C | 16°C | 6°C / 37°C | 88 mm | 72% | 11 km/h |
| July | 28°C | 20°C | 13°C / 37°C | 97 mm | 75% | 11 km/h |
| August | 27°C | 19°C | 10°C / 35°C | 74 mm | 74% | 11 km/h |
| September | 24°C | 15°C | 4°C / 33°C | 79 mm | 75% | 11 km/h |
| October | 18°C | 10°C | -3°C / 30°C | 95 mm | 75% | 12 km/h |
| November | 12°C | 3°C | -12°C / 26°C | 62 mm | 68% | 13 km/h |
| December | 7°C | 0°C | -14°C / 19°C | 88 mm | 71% | 13 km/h |
Best time to visit Brookhaven
The most comfortable time to visit Brookhaven is generally June and August to September, balancing mild daytime temperatures against the driest stretch of the year. The city has strongly marked seasons and rain concentrates around July, totalling about 930 mm a year.
Travellers who prefer heat should aim for July, when highs average 28°C. July is the month to avoid if rain would spoil your plans — it averages 97 mm, roughly 2× the rainfall of the driest month (February).
Source: OpenWeather historical and statistical weather data. Values are long-term averages, not a forecast — see the Brookhaven forecast for what is happening now.