What is the best way to use the New Hampshire climate data?
Use the monthly high and low averages to compare county by season, then open the climate trends page for a month-by-month chart.
County count
10
Summer candidates
2
Winter candidates
0
New Hampshire Climate Summary
Seasonal climate context for search and comparison
New Hampshire includes 10 county records. The annual average high is 55.6℉ and the annual average low is 34.3℉ based on the monthly climate dataset.
July has the highest average high at 79.9℉, while January has the lowest average low at 10.8℉. This helps compare summer comfort and winter warmth without relying on a single daily weather snapshot.
Under the default summer filter, 2 county match the cooling criteria. Under the default winter filter, 0 county match the warm-winter criteria.
Cool-summer candidates include Coos County, Grafton County.
New Hampshire Monthly Temperature Charts
State / County Average high Average low
Jan
29.7℉
10.8℉
Feb
32.9℉
12.2℉
Mar
41.4℉
20.7℉
Apr
54.5℉
31.3℉
May
66.7℉
42.3℉
Jun
75.0℉
51.6℉
Jul
79.9℉
57.0℉
Aug
78.3℉
55.2℉
Sep
70.7℉
47.7℉
Oct
57.9℉
37.0℉
Nov
45.7℉
27.7℉
Dec
34.9℉
18.0℉
Summer candidates
Jun-Aug average high no higher than 78.8℉, scroll to view all 2
| County | Average high | Average low |
|---|---|---|
| Coos County | 73.4℉ | 50.5℉ |
| Grafton County | 75.7℉ | 52.0℉ |
Winter candidates
Dec-Feb average low no lower than 41.0℉, scroll to view all 0
| County | Average high | Average low |
|---|---|---|
No matching counties | ||
New Hampshire County Highlights
Rank counties by summer comfort, winter warmth, and seasonal stability
Coolest Summer
Coos County Average high 73.4℉ Grafton County Average high 75.7℉ Carroll County Average high 77.2℉ Sullivan County Average high 77.2℉ Cheshire County Average high 78.1℉ Belknap County Average high 78.6℉ Merrimack County Average high 78.8℉ Strafford County Average high 79.2℉ Hillsborough County Average high 79.3℉ Rockingham County Average high 79.9℉Warmest Winter
Rockingham County Average low 17.6℉ Hillsborough County Average low 16.3℉ Strafford County Average low 16.0℉ Cheshire County Average low 15.1℉ Belknap County Average low 14.4℉ Merrimack County Average low 14.4℉ Sullivan County Average low 12.7℉ Carroll County Average low 12.0℉ Grafton County Average low 10.4℉ Coos County Average low 7.5℉Frequently Asked Questions
Short answers based on the same visible climate data.
What does the summer filter mean?
The default summer filter selects places where June, July, and August average highs are no higher than 78.8℉.
What does the winter filter mean?
The default winter filter selects places where December, January, and February average lows are no lower than 41.0℉.