Grantham weather live forecast

Today's maximum temperature in Grantham is expected to be 30°C. Select a day from the live weather forecast for Grantham, England, UK for more weather parameters.

Tuesday
12th Aug
30

16

6

5
Wednesday
13th Aug
32

18

11

5
Thursday
14th Aug
27

18

7

3
Friday
15th Aug
27

15

11

5
Saturday
16th Aug
25

14

5

5

5-day weather forecast updated at 04:04 on Tuesday 12th August 2025 GMT

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The 5-day weather forecast for England (Grantham) is provided by the Swiss meteorological agency, meteoblue. Find out more about our data sources.

Grantham weather forecast by day

Below are the detailed weather forecasts for Grantham for the next 5 days.

Grantham weather for Tuesday 12th August 2025

Expect sunshine and showers in Grantham, England with a maximum temperature of 30°C, moderate levels of heat & humidity, maximum UV of 5 (Moderate) and 6 hours of bright sunshine. There are 0-2 mm of rainfall expected with 1% chance of some rain and a moderate breeze of 20 kph from the east.

30
°C maximum temperature
16
°C minimum temperature
sunshine and showers
6
hours of sunshine
5
UV index (Moderate)
1
% chance of some rain
<2
mm of rainfall expected
M
moderate heat & humidity
20
kph wind from E

Grantham weather for Wednesday 13th August 2025

Expect scattered clouds in Grantham, England with a maximum temperature of 32°C, moderate levels of heat & humidity, maximum UV of 5 (Moderate) and 11 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 18 kph from the south-west.

32
°C maximum temperature
18
°C minimum temperature
scattered clouds
11
hours of sunshine
5
UV index (Moderate)
0
mm of rainfall expected
M
moderate heat & humidity
18
kph wind from SW

Grantham weather for Thursday 14th August 2025

Expect broken clouds in Grantham, England with a maximum temperature of 27°C, low levels of heat & humidity, maximum UV of 3 (Moderate) and 7 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 21 kph from the west.

27
°C maximum temperature
18
°C minimum temperature
broken clouds
7
hours of sunshine
3
UV index (Moderate)
0
mm of rainfall expected
L
low heat & humidity
21
kph wind from W

Grantham weather for Friday 15th August 2025

Expect scattered clouds in Grantham, England with a maximum temperature of 27°C, low levels of heat & humidity, maximum UV of 5 (Moderate) and 11 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 21 kph from the east.

27
°C maximum temperature
15
°C minimum temperature
scattered clouds
11
hours of sunshine
5
UV index (Moderate)
0
mm of rainfall expected
L
low heat & humidity
21
kph wind from E

Grantham weather for Saturday 16th August 2025

Expect broken clouds in Grantham, England with a maximum temperature of 25°C, maximum UV of 5 (Moderate) and 5 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 20 kph from the north-east.