The best times to visit Grantham for ideal weather are

June 11th 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.

 

 


Other Grantham Travel Info

Weather in Grantham

Temperature

Average temperatures in Grantham vary greatly. Considering humidity, temperatures feel cold for about half of the year and otherwise nice with a fair chance of precipitation about half of the year. The area is less temperate than some — in the 29th 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 Grantham, the hottest months are July, August, and then June. See average monthly temperatures below. The warmest time of year is generally early August where highs are regularly around 72.6°F (22.6°C) with temperatures rarely dropping below 53.5°F (11.9°C) at night.

Grantham Temperatures (Fahrenheit)

Key
High
Average
Low

Grantham 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.

Grantham Perceived Temperature (F)

Key
High
Average
Low

Grantham Perceived Temperature (C)

Key
High
Average
Low

 

Average Grantham 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

MonthAvg. High (°F)Avg. Mean (°F)Avg. Low (°F)
Jan44.639.734
Feb45.439.633.4
Mar50.942.935.5
Apr57.448.239.9
May61.652.844.3
Jun66.557.749.5
Jul71.161.753
Aug70.461.353.1
Sep65.556.949.1
Oct58.651.644.7
Nov50.44538.8
Dec4540.234.6

Show Celsius

MonthAvg. High (°C)Avg. Mean (°C)Avg. Low (°C)
Jan74.31.1
Feb7.44.20.8
Mar10.56.11.9
Apr14.194.4
May16.411.66.8
Jun19.214.39.7
Jul21.716.511.7
Aug21.316.311.7
Sep18.613.89.5
Oct14.810.97.1
Nov10.27.23.8
Dec7.24.61.4

 


 

Precipitation (Rain or Snow)

If dry weather is what you’re after, the months with the lowest chance of significant precipitation in Grantham are March, April, 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 March. For example, on the week of March 19th there are no days of precipitation on average. By contrast, it’s most likely to rain or snow in late May to early June with an average of 2 days of significant precipitation the week of May 28th.

When can you find snow in Grantham? Weather stations report a good amount of seasonal snow likely to be deepest around December, especially close to early to mid December. The best time to ski (if at all) in Grantham is often around around December 10th 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.

Chance of Precipitation

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

Key
Days with precipitation

Snow on the Ground

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

Key
Snow depth

Average Rain and Snow by Month

Show Inches

MonthDaily Chance of RainAverage Snow Depth (in)Total Precipitation (in)
Jan20%1.91.9
Feb18%1.81.4
Mar11%2.21.3
Apr11%01.4
May20%02.4
Jun21%02.7
Jul21%02.3
Aug20%02.5
Sep13%01.3
Oct22%0.42.2
Nov22%1.82.3
Dec21%3.32

Show Centimeters

MonthDaily Chance of RainAverage Snow Depth (cm)Total Precipitation (cm)
Jan204.84.8
Feb184.63.6
Mar115.63.3
Apr1103.6
May2006.1
Jun2106.9
Jul2105.8
Aug2006.4
Sep1303.3
Oct2215.6
Nov224.65.8
Dec218.45.1

 

Humidity and Wind

Grantham has some extremely humid months, and above average humidity throughout the year. The least humid month is July (66.6% relative humidity), and the most humid month is December (83.5%).

Wind in Grantham is usually moderate. The windiest month is December, followed by January and November. December’s average wind speed of around 12.4 knots (14.3 MPH or 23 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 early to mid January where average top sustained speeds reach 20 knots, which is considered a fresh breeze.

Relative Humidity (%)

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

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.

MonthAvg. WindAvg. Wind FeelSustained High WindHigh Wind Feel
Jan12.3Significant breeze18.7Strong breeze
Feb11Significant breeze16.7Significant breeze
Mar10.9Gentle breeze16.9Strong breeze
Apr9.7Gentle breeze15.4Significant breeze
May10.2Gentle breeze16.1Strong breeze
Jun8.8Gentle breeze14.3Significant breeze
Jul9.2Gentle breeze14.9Strong breeze
Aug9.8Gentle breeze15.6Significant breeze
Sep9.6Gentle breeze15.2Strong breeze
Oct10.2Gentle breeze15.9Significant breeze
Nov11.3Significant breeze17.6Strong breeze
Dec12.4Significant breeze18.8Strong breeze

Show Relative Humidity by Month

MonthAvg. Relative Humidity
Jan82.5%
Feb80%
Mar71%
Apr67.3%
May67.1%
Jun68.8%
Jul66.6%
Aug67.4%
Sep73.1%
Oct79.1%
Nov83.5%
Dec83.5%

 

Is it Safe to Travel to Grantham?

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 Grantham, the United Kingdom is November, followed by September and June. 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 Grantham in December. 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 59.7 in December means 59.7% of the tourists vs. November.

 

 

Overall Grantham Travel Experience by Season

Spring (March through May)

Humidity and temperatures combine to make this season feel moderately cold. Highs range from 64.1°F (17.8°C) and 48.5°F (9.2°C) with warmer temperatures in the later months. Rain is somewhat common with 3 to 6 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 comfortably cool weather with high temperatures that are comfortable. These months see the most precipitation with 6 to 7 days of precipitation per month. June – August is the second busiest season for tourism in Grantham, so lodging and other accommodations may cost slightly more.

Fall (September through November)

Fall daily highs range from 67.7°F (19.8°C) and 45.9°F (7.7°C), which will feel chilly given the humidity and wind. It rains or snows a significant amount: 4 to 7 days per month. Tourism is the busiest during these months due to the weather, so hotels may be higher priced.

Winter (December through February)

Weather is too cold this time of year in Grantham to be enjoyable for warm weather travelers. The average high during this season is between 48.5°F (9.2°C) and 42.7°F (5.9°C). On average, it rains or snows a fair amount: 5 to 6 times per month. These times of year are the slowest with tourists.

 

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