Grantham Weather in September

During September, Grantham experiences pleasant daytime temperatures of 20°C (68°F) and cooler nights around 11°C (52°F). Expect quite a bit of rainfall. Around 62 mm (2.4 in) is typical.

Rainfall in Grantham in September

You can typically expect 12 days of rain this month, averaging around 62 mm (2.4 in). The rainfall pattern this month is fairly balanced. Showers tend to be moderate rather than extreme.

Temperature in Grantham in September

If you're visiting Grantham in September, expect excellent temperatures with highs of 20°C (68°F) and overnight lows of 11°C (52°F). The difference between afternoon and evening temperatures is usually noticeable. With lows of 11°C (52°F), nights are cool. If you're out after dark, an extra layer will keep you comfortable. The cooler air at night is also great for getting a good rest.

Sunshine in Grantham in September

The area enjoys a balanced 139 hours of sunlight, ensuring it's neither too overcast nor too sunny.

If you're inclined towards comfortable temperatures and drier conditions, September is a good time to visit Grantham.