The best times to visit Dartmouth for ideal weather are

May 28th to October 7th

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



Other Dartmouth Travel Info

Weather in Dartmouth


Average temperatures in Dartmouth vary somewhat. 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 28th 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 Dartmouth, the hottest months are July, August, and then June. See average monthly temperatures below. The warmest time of year is generally late July where highs are regularly around 69.7°F (20.9°C) with temperatures rarely dropping below 56.1°F (13.4°C) at night.

Dartmouth Temperatures (Fahrenheit)


Dartmouth Temperatures (Celsius)


“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.

Dartmouth Perceived Temperature (F)


Dartmouth Perceived Temperature (C)



Average Dartmouth 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 48.1 43.9 39.2
Feb 48.5 43.6 39
Mar 52.2 45.5 39.9
Apr 56.8 49.4 43.2
May 60.4 53.6 47.5
Jun 65.5 58.1 51.8
Jul 67.9 60.9 55.2
Aug 67.3 60.5 54.9
Sep 65.1 58 52.1
Oct 59.9 54.5 49.2
Nov 53.6 49.2 44.4
Dec 49.2 45.1 40.3

Show Celsius

Month Avg. High (°C) Avg. Mean (°C) Avg. Low (°C)
Jan 8.9 6.6 4
Feb 9.2 6.4 3.9
Mar 11.2 7.5 4.4
Apr 13.8 9.7 6.2
May 15.8 12 8.6
Jun 18.6 14.5 11
Jul 19.9 16.1 12.9
Aug 19.6 15.8 12.7
Sep 18.4 14.4 11.2
Oct 15.5 12.5 9.6
Nov 12 9.6 6.9
Dec 9.6 7.3 4.6



Precipitation (Rain or Snow)

If dry weather is what you’re after, the months with the lowest chance of significant precipitation in Dartmouth are September, April, and then June. Note that we define “significant precipitation” as .1 inches or more in this section. The lowest chance of rain or snow occurs around late May. For example, on the week of May 21st there is 1 day of precipitation on average. By contrast, it’s most likely to rain or snow in mid January with an average of 3 days of significant precipitation the week of January 15th.

When can you find snow in Dartmouth? Weather stations report no annual snow. 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.

Chance of Precipitation

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

Days with precipitation

Snow on the Ground

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

Snow depth

Average Rain and Snow by Month

Show Inches

Month Daily Chance of Rain Average Snow Depth (in) Total Precipitation (in)
Jan 39% 0 4.6
Feb 35% 0 3.8
Mar 23% 0 2.8
Apr 20% 0 2.3
May 23% 0 2.4
Jun 23% 0 2.6
Jul 23% 0 2.9
Aug 30% 0 4.2
Sep 15% 0 2
Oct 33% 0 4.3
Nov 40% 0 4.5
Dec 38% 0 4.8

Show Centimeters

Month Daily Chance of Rain Average Snow Depth (cm) Total Precipitation (cm)
Jan 39 0 11.7
Feb 35 0 9.7
Mar 23 0 7.1
Apr 20 0 5.8
May 23 0 6.1
Jun 23 0 6.6
Jul 23 0 7.4
Aug 30 0 10.7
Sep 15 0 5.1
Oct 33 0 10.9
Nov 40 0 11.4
Dec 38 0 12.2


Humidity and Wind

Dartmouth has some extremely humid months, and high humidity throughout the year. The least humid month is April (72.7% relative humidity), and the most humid month is October (82.2%).

Wind in Dartmouth is usually moderate. The windiest month is December, followed by January and November. December’s average wind speed of around 12.5 knots (14.3 MPH or 23.1 KPH) is considered “a moderate breeze.” Maximum sustained winds (the highest speed for the day lasting more than a few moments) are at their highest in late December where average top sustained speeds reach 22.3 knots, which is considered a strong breeze.

Relative Humidity (%)

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

Avg. Relative Humidity


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

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 11.9 Significant breeze 19.4 Strong breeze
Feb 10.8 Gentle breeze 17.9 Strong breeze
Mar 10 Gentle breeze 16.5 Strong breeze
Apr 9.1 Gentle breeze 15.1 Significant breeze
May 9.8 Gentle breeze 15.4 Strong breeze
Jun 9.1 Gentle breeze 14.8 Significant breeze
Jul 9.4 Gentle breeze 15.1 Strong breeze
Aug 9.3 Gentle breeze 15.2 Significant breeze
Sep 8.7 Gentle breeze 14.4 Strong breeze
Oct 10.2 Gentle breeze 16.6 Significant breeze
Nov 11.5 Significant breeze 19 Strong breeze
Dec 12.5 Significant breeze 20.2 Strong breeze

Show Relative Humidity by Month

Month Avg. Relative Humidity
Jan 81.8%
Feb 80%
Mar 74%
Apr 72.7%
May 74.8%
Jun 75.2%
Jul 78.5%
Aug 80.6%
Sep 79.1%
Oct 82.2%
Nov 82%
Dec 81.5%


Is it Safe to Travel to Dartmouth?

Our best data indicates this area is somewhat safe. As of Oct 07, 2019 there are travel warnings for the United Kingdom; exercise a high degree of caution. Check this page for any recent changes or regions to avoid: Travel Advice and Advisories. This advisory was last updated on Sep 06, 2019.


The Busiest and Least Crowded Months

The busiest month for tourism in Dartmouth, the United Kingdom is July, followed by May 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 Dartmouth 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

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 39.7 in November means 39.7% of the tourists vs. July.



Overall Dartmouth Travel Experience by Season

Spring (March through May)

Humidity and temperatures combine to make this season feel moderately cold. Highs range from 63.5°F (17.5°C) and 49.7°F (9.8°C) with warmer temperatures in the later months. Rain is somewhat common with 6 to 7 days of significant precipitation per month. Spring is the second busiest for tourism, which makes it a good time for those looking for things to do.

Summer (June through August)

The middle-year months have comfortably cool weather with high temperatures that are comfortable. These months see moderate precipitation with 7 to 9 days of precipitation per month. June – August is the busiest season for tourism in Dartmouth, so lodging and other accommodations may cost more than usual.

Fall (September through November)

Fall daily highs range from 66.7°F (19.3°C) and 49.7°F (9.8°C), which will feel chilly given the humidity and wind. It rains or snows a significant amount: 5 to 12 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 too cold this time of year in Dartmouth to be enjoyable for warm weather travelers. The average high during this season is between 50°F (10°C) and 46.3°F (7.9°C). On average, it rains or snows a great amount: 10 to 12 times per month. These times of year are fairly slow with tourists.


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