Grimstad Weather in September

September in Grimstad typically sees daytime highs of 17°C (63°F) and nighttime lows of 10°C (50°F). Rainfall is also possible this month, so it's worth packing an umbrella.

Rainfall in Grimstad in September

Historically, approximately 17 days this month are expected to have rain, averaging 117 mm (4.6 in). This month brings frequent, heavy showers. Both the number of wet days and the rainfall totals are on the high side.

Temperature in Grimstad in September

If you're visiting Grimstad in September, expect highs of 17°C (63°F) and overnight lows around 10°C (50°F). Temperatures can feel cooler in the morning and evening, so layering is often the best approach. At 10°C (50°F) overnight, it can feel quite a bit cooler after dark. Worth packing something warmer for evenings, but the cooler temperatures are ideal for sleeping.

Sunshine in Grimstad in September

The area enjoys a balanced 151 hours of sunlight, ensuring it's neither too overcast nor too sunny.

Should you favor a climate that's both dry and comfortably warm, July typically offers the most agreeable circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.