UTC Offset
UTC+01:00
Grantham, United Kingdom Snapshot 2026
Where is Grantham?
Grantham, United Kingdom
- Continent
- Europe
- Country
- United Kingdom
- City
- Grantham
- Population
- 43.8K
- Coordinates
- 52.91°, -0.64°
Grantham is a city in United Kingdom with a population of approximately 43.8K. Average temperatures range from 2°C (35°F) in January to 22°C (71°F) in July. The best time to visit is June, July, August, September.
Time in Grantham right now
Open full time & time zone page 22:55 55
Monday, June 15, 2026
IANA time zone
Europe/London
Daylight saving
DST in effect
GMT / BST
Next DST change
October 25
backward -1h
Live weather in Grantham
Daylight in Grantham today
View full sunrise & sunset page Sunrise
Sunset
Day length
16h 53m
Climate normals for Grantham
Long-term monthly averages based on historical data.
January
Poor 
February
Poor March
Poor April
Fair May
Fair June best
Good July best
Excellent August best
Excellent September best
Good October
Fair November
Poor December
Poor | Month | Temp | Feels Like | Rain | Sun | Humidity | UV | Status | Details |
|---|---|---|---|---|---|---|---|---|
| January | 7°C / 2°C | 3°C / -2°C | 10days (51 mm) Wet | 3.6h Poor | 86% Very Muggy | 1 Low | Poor | View Details |
| February | 9°C / 3°C | 4°C / -2°C | 10days (53 mm) Wet | 5.1h Fair | 81% Humid | 1.6 Low | Poor | View Details |
| March | 10°C / 3°C | 6°C / -1°C | 11days (59 mm) Wet | 6.6h Fair | 80% Humid | 3.1 Moderate | Poor | View Details |
| April | 13°C / 4°C | 9°C / 1°C | 10days (42 mm) Wet | 9.2h Good | 75% Muggy | 4.5 Moderate | Fair | View Details |
| May | 16°C / 8°C | 14°C / 5°C | 10days (55 mm) Wet | 10.1h Excellent | 75% Muggy | 5.2 High | Fair | View Details |
| June best | 20°C / 11°C | 18°C / 10°C | 11days (66 mm) Wet | 10.1h Excellent | 74% Muggy | 6.1 High | Good | View Details |
| July best | 22°C / 14°C | 20°C / 12°C | 12days (67 mm) Wet | 10.2h Excellent | 72% Muggy | 5.5 High | Excellent | View Details |
| August best | 21°C / 13°C | 20°C / 12°C | 10days (58 mm) Wet | 9.4h Good | 72% Muggy | 5 Moderate | Excellent | View Details |
| September best | 19°C / 11°C | 17°C / 9°C | 11days (63 mm) Wet | 7.4h Good | 77% Humid | 3.6 Moderate | Good | View Details |
| October | 15°C / 9°C | 12°C / 6°C | 12days (74 mm) Wet | 5.4h Fair | 82% Humid | 2.3 Moderate | Fair | View Details |
| November | 10°C / 5°C | 7°C / 1°C | 11days (65 mm) Wet | 3.9h Poor | 87% Very Muggy | 1.2 Low | Poor | View Details |
| December | 8°C / 4°C | 5°C / 0°C | 12days (66 mm) Wet | 2.8h Poor | 89% Very Muggy | 0.7 Low | Poor | View Details |
Monthly Temperatures
HighLow
Line chart showing monthly temperatures. Jan: 7°C / 2°C . Feb: 9°C / 3°C . Mar: 10°C / 3°C . Apr: 13°C / 4°C . May: 16°C / 8°C . Jun: 20°C / 11°C . Jul: 22°C / 14°C . Aug: 21°C / 13°C . Sep: 19°C / 11°C . Oct: 15°C / 9°C . Nov: 10°C / 5°C . Dec: 8°C / 4°C .
Monthly Rainfall
Rainfall
Bar chart showing monthly rainfall. Jan: 51 mm. Feb: 53 mm. Mar: 59 mm. Apr: 42 mm. May: 55 mm. Jun: 66 mm. Jul: 67 mm. Aug: 58 mm. Sep: 63 mm. Oct: 74 mm. Nov: 65 mm. Dec: 66 mm.
Monthly Humidity
Humidity
Line chart showing monthly humidity. Jan: 86%. Feb: 81%. Mar: 80%. Apr: 75%. May: 75%. Jun: 74%. Jul: 72%. Aug: 72%. Sep: 77%. Oct: 82%. Nov: 87%. Dec: 89%.
Monthly Wind Speed
Wind SpeedGusts
Bar chart showing monthly wind speed. Jan: 24 km/h . Feb: 27 km/h . Mar: 24 km/h . Apr: 21 km/h . May: 20 km/h . Jun: 20 km/h . Jul: 20 km/h . Aug: 21 km/h . Sep: 22 km/h . Oct: 24 km/h . Nov: 23 km/h . Dec: 24 km/h .
UV Index
UV Index
Bar chart showing monthly UV index. Jan: UV 1. Feb: UV 2. Mar: UV 3. Apr: UV 5. May: UV 5. Jun: UV 6. Jul: UV 6. Aug: UV 5. Sep: UV 4. Oct: UV 2. Nov: UV 1. Dec: UV 1.
Frequently Asked Questions
Grantham has a population of approximately 43.8K.
The best months to visit Grantham are June, July, August, September, when temperatures are pleasant and rainfall is lower.
Grantham receives approximately 719mm of rainfall annually across 130 rainy days.
Grantham is located in United Kingdom, in the Europe region.