Tønsberg Weather in September

September in Tønsberg sees daytime temperatures around 17°C (63°F) and lows of 11°C (52°F) at night. With around 115 mm (4.5 in) of rainfall expected, it's worth packing a rain jacket.

Rainfall in Tønsberg in September

You can typically expect 16 days of rain this month, averaging around 115 mm (4.5 in). Wet weather is a regular and significant part of this month. Frequent days of rain combined with high totals means proper waterproofs are worth packing.

Temperature in Tønsberg in September

In September, Tønsberg sees moderate temperatures, with highs of 17°C (63°F). Nights drop to around 11°C (52°F). The difference between afternoon and evening temperatures is usually noticeable. At 11°C (52°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 Tønsberg in September

With about 149 hours of sunshine, the area enjoys a nice balance of sun and overcast, creating a pleasant environment.

If you prefer dry days with pleasant temperatures, July and August typically offer the best circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.