The best times to visit New Hampshire for ideal weather are

May 21st to September 30th

based on average temperature and humidity from NOAA (the National Oceanic and Atmospheric Administration). Read below for more weather and travel details.

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Weather in New Hampshire

Temperature

Average temperatures in New Hampshire vary drastically. Considering humidity, temperatures feel cold for about half of the year and otherwise nice with a chance of rain or snow throughout most of the year. The area is less temperate than some — in the 26th percentile for pleasant weather — compared to tourist destinations worldwide. Weeks with ideal weather are listed above. If you’re looking for the very warmest time to visit New Hampshire, the hottest months are July, August, and then June. See average monthly temperatures below. The warmest time of year is generally mid July where highs are regularly around 81.2°F (27.3°C) with temperatures rarely dropping below 59.6°F (15.3°C) at night.

New Hampshire Temperatures (Fahrenheit)

Key
High
Average
Low

New Hampshire Temperatures (Celsius)

Key
High
Average
Low

“Feels-Like” Temperatures

The way we experience weather isn’t all about temperature. Higher temperatures affect us much more at higher humidity, and colder temperatures feel piercing with high winds. Our perceived temperatures factor in humidity and wind chill to better represent how hot or cold the day feels to a person.

New Hampshire Perceived Temperature (F)

Key
High
Average
Low

New Hampshire Perceived Temperature (C)

Key
High
Average
Low

 

Average New Hampshire Temperatures by Month

Daily highs (averaged for the month) usually give the best indication of the weather. A significantly lower mean and low generally just means it gets colder at night.

Show Fahrenheit

Month Avg. High (°F) Avg. Mean (°F) Avg. Low (°F)
Jan 30.8 21.3 12.2
Feb 32.2 22.3 13
Mar 42.2 31.6 22.4
Apr 55.8 44.1 33.9
May 68.2 55.8 44.7
Jun 74 62.9 53.1
Jul 79.9 68.8 58.8
Aug 78.1 66.7 56.6
Sep 71.6 59.8 49.8
Oct 59.1 48.6 39.6
Nov 47.8 37.8 29.3
Dec 36.8 28.5 20.8

Show Celsius

Month Avg. High (°C) Avg. Mean (°C) Avg. Low (°C)
Jan -0.7 -5.9 -11
Feb 0.1 -5.4 -10.6
Mar 5.7 -0.2 -5.3
Apr 13.2 6.7 1.1
May 20.1 13.2 7.1
Jun 23.3 17.2 11.7
Jul 26.6 20.4 14.9
Aug 25.6 19.3 13.7
Sep 22 15.4 9.9
Oct 15.1 9.2 4.2
Nov 8.8 3.2 -1.5
Dec 2.7 -1.9 -6.2

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Precipitation (Rain or Snow)

If dry weather is what you’re after, the months with the lowest chance of significant precipitation in New Hampshire are January, November, and then September. Note that we define “significant precipitation” as .1 inches or more in this section. The lowest chance of rain or snow occurs around mid to late September. For example, on the week of September 17th there is 1 day of precipitation on average. By contrast, it’s most likely to rain or snow in early to mid June with an average of 2 days of significant precipitation the week of June 11th.

When can you find snow in New Hampshire? Weather stations report very large amounts of snow likely to be deepest around February, especially close to late February and early March. The best time to ski (if at all) in New Hampshire is often around around December 3rd when fresh powder is deepest. Please note that a value of 0 for snow in the graph below may either mean there was no snow, or that snow is unreported.

Chanceof Precipitation

The graph below shows the % chance of rainy and snowy days in New Hampshire.

Key
Days with precipitation

Snow on the Ground

The graph below shows the average snow on the ground in New Hampshire (in).

Key
Snow depth

Average Rain and Snow by Month

Show Inches

Month Daily Chance of Rain Average Snow Depth (in) Total Precipitation (in)
Jan 15% 8.6 2
Feb 17% 13.4 2.3
Mar 18% 11.6 2.9
Apr 20% 5.7 3
May 21% 2.8 2.9
Jun 27% 1.2 4.2
Jul 24% 0 4.1
Aug 18% 0 3.7
Sep 17% 1.2 3.1
Oct 21% 4.7 3.9
Nov 16% 4.6 2.4
Dec 24% 6.6 3.4

Show Centimeters

Month Daily Chance of Rain Average Snow Depth (cm) Total Precipitation (cm)
Jan 15 21.8 5.1
Feb 17 34 5.8
Mar 18 29.5 7.4
Apr 20 14.5 7.6
May 21 7.1 7.4
Jun 27 3 10.7
Jul 24 0 10.4
Aug 18 0 9.4
Sep 17 3 7.9
Oct 21 11.9 9.9
Nov 16 11.7 6.1
Dec 24 16.8 8.6

 

Humidity and Wind

New Hampshire has some high humidity months, with other comfortably humid months. The least humid month is April (51.5% relative humidity), and the most humid month is September (68.4%).

Wind in New Hampshire is usually calm. The windiest month is March, followed by February and January. March’s average wind speed of around 7.9 knots (9.1 MPH or 14.7 KPH) is considered “a gentle breeze.” Maximum sustained winds (the highest speed for the day lasting more than a few moments) are at their highest in early to mid February where average top sustained speeds reach 16.4 knots, which is considered a moderate breeze.

Relative Humidity (%)

The graph below shows the average % humidity by month in New Hampshire.

Key
Avg. Relative Humidity

Wind

The graph below shows wind speed (max and average) in knots.

Key
Max Sustained Wind
Average Daily Wind

Average Wind Speeds

Show Wind Speeds

All wind speeds are in knots. 1 knot = 1.15 MPH or 1.85 KPH.

Month Avg. Wind Avg. Wind Feel Sustained High Wind High Wind Feel
Jan 7.6 Gentle breeze 15.3 Significant breeze
Feb 7.9 Gentle breeze 15.7 Significant breeze
Mar 7.9 Gentle breeze 15.6 Significant breeze
Apr 7.6 Gentle breeze 15.6 Significant breeze
May 6.3 Light breeze 13.6 Significant breeze
Jun 5.5 Light breeze 12.2 Significant breeze
Jul 5.1 Light breeze 11.8 Significant breeze
Aug 4.7 Light breeze 11.2 Significant breeze
Sep 5.1 Light breeze 11.4 Significant breeze
Oct 6.3 Light breeze 13.3 Significant breeze
Nov 6.7 Light breeze 13.6 Significant breeze
Dec 7.3 Gentle breeze 14.4 Significant breeze

Show Relative Humidity by Month

Month Avg. Relative Humidity
Jan 58.6%
Feb 54.3%
Mar 52.1%
Apr 51.5%
May 57.1%
Jun 65.8%
Jul 66.9%
Aug 67.8%
Sep 68.4%
Oct 66.6%
Nov 61.3%
Dec 66%

 

Is it Safe to Travel to New Hampshire?

Our best data indicates this area is generally safe. As of Jan 19, 2018 there are no travel advisories or warnings for the United States; exercise normal security precautions. Check this page for any recent changes or regions to avoid: Travel Advice and Advisories


 

The Busiest and Least Crowded Months

The busiest month for tourism in New Hampshire, United States is June, followed by August and September. Prices for hotels and flights will be most expensive during these months, though you can save if you purchase well in advance. Tourists are unlikely to visit New Hampshire in November. Those willing to visit at these times will likely find it the least expensive month.

Estimated Tourism by Month

 

Most Popular Months to Visit

Key
Tourists Seeking Accommodations

Tourism graph is based on Google searches for services used by tourists relative to the rest of the year. Tourism data for this area is somewhat extrapolated based on nearby areas. Displayed data is calculated relative to the peak, so a score of 56.3 in November means 56.3% of the tourists vs. June.


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Overall New Hampshire Travel Experience by Season

Spring (March through May)

Humidity and temperatures combine to make this season feel moderately cold. Highs range from 72.8°F (22.7°C) and 34.1°F (1.2°C) with far warmer temperatures in the later months. Rain is somewhat common with 6 to 7 days of significant precipitation per month. Spring is fairly slow for tourism, which makes it a good time for those looking for deals.

Summer (June through August)

The middle-year months have very comfortable weather with high temperatures that are comfortable. These months see the most precipitation with 6 to 8 days of precipitation per month. June – August is the busiest season for tourism in New Hampshire, so lodging and other accommodations may cost more than usual.

Fall (September through November)

Fall daily highs range from 76.7°F (24.8°C) and 42.3°F (5.7°C), which will feel chilly given the humidity and wind. It rains or snows a significant amount: 5 to 7 days per month. Tourism is the slowest during these months due to the weather, so hotels may be affordably priced.

Winter (December through February)

Weather is far too cold this time of year in New Hampshire to be enjoyable for warm weather travelers. The average high during this season is between 38.7°F (3.7°C) and 27.5°F (-2.5°C). On average, it rains or snows a fair amount: 5 to 7 times per month. These times of year are the second busiest with tourists.

 

Best Times to Travelthe United States › New Hampshire, United States

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