Nickerson State Park Weather
Nickerson State Park has mild summers and cold, wet winters. At the nearest long-term weather station, Chatham Municipal Airport, July averages a high of 79°F and a low of 64°F, and January averages 39°F and 26°F. Summer is the driest season, and late fall and winter bring the most rain. For today's conditions, use the National Weather Service forecast for the park.
Average Weather by Month
These are NOAA's official 1991–2020 climate normals for Chatham Municipal Airport, about six miles south of the park. Brewster sits on Cape Cod Bay rather than the open Atlantic, so treat them as a close guide, not an exact match.
| Month | Avg high | Avg low | Precipitation |
|---|---|---|---|
| January | 39°F | 26°F | 3.75 in |
| February | 40°F | 26°F | 3.61 in |
| March | 44°F | 31°F | 4.43 in |
| April | 52°F | 39°F | 4.01 in |
| May | 62°F | 48°F | 3.34 in |
| June | 72°F | 57°F | 2.95 in |
| July | 79°F | 64°F | 2.79 in |
| August | 78°F | 64°F | 3.03 in |
| September | 71°F | 58°F | 3.58 in |
| October | 61°F | 47°F | 4.23 in |
| November | 52°F | 39°F | 4.47 in |
| December | 44°F | 31°F | 5.00 in |
Source: NOAA NCEI 1991–2020 monthly climate normals, Chatham Municipal Airport (USW00094624).
Summer (June to August)
This is camping and swimming season. July is the warmest month, averaging 79°F by day and 64°F at night, and August is almost the same. June and July are among the driest months of the year, with under three inches of rain each on average. Summer is when Flax and Cliff ponds see the most swimmers.
July nights average in the mid-60s, so pack a warm layer. If a thunderstorm comes through, get off the water and away from the beach at the first thunder.
Spring (March to May)
Spring warms slowly. May averages 62°F by day and 48°F at night. The campground opens in mid-April (the 2026 season ran April 16 to October 25, 2026), so early-season campers should expect nights near 39°F in April. Spring is also when the stocked trout ponds fish best from shore (see fishing).
Fall (September to November)
September is still warm, averaging 71°F by day, warmer than June at night. October cools to 61°F and 47°F, and rain picks up through November.
Winter (December to February)
Winter is cold. January averages 39°F and 26°F. December is the wettest month on average, with 5 inches of precipitation. The campground is closed, but the park is open sunrise to sunset (see hours) for walks, biking and, when the ponds freeze, skating and ice fishing.
Packing for the Weather
- A warm layer for evenings in every month, including July.
- A rain shell. Even the driest months average nearly three inches of rain.
- Warm bedding for yurts in spring and fall: they aren't heated.
- Sunscreen and water for the beach and the bike paths.
Checking the Forecast
We don't post a forecast here, because a copy goes stale. The National Weather Service point forecast for the park's coordinates is the most direct source; it also carries any watches or warnings for the area.
Nickerson Weather FAQ
What is the weather like at Nickerson State Park in summer?
Warm and fairly dry. July averages a high of 79°F and a low of 64°F at nearby Chatham, with under three inches of rain.
What's the best month to camp at Nickerson?
For warm weather, July and August. September is still about 71°F by day, with nights about as warm as June's.
How cold does it get at Nickerson at night?
In July, about 64°F on average. In April, when the campground opens, about 39°F. In January, about 26°F.
What is the driest month on Cape Cod?
At Chatham, July, with 2.79 inches of precipitation on average (NOAA 1991–2020 normals).
Where can I get a forecast for Nickerson State Park?
Use the National Weather Service point forecast for the park's coordinates in Brewster.
Facts checked against the DCR page for Nickerson State Park on October 17, 2026.