Norway

Trondheim in July: weather, sea & travel advice

This month's data profile

Rain shapes the decision

Trondheim in July is climatically mixed. The average daily high is around 18 °C, and the sea is about 13 °C. With about 20 rainy days it is very wet.

Historical monthly averages, not a weather forecast. Individual days and years can differ substantially.

Rank among 12 monthly averages

39/100 · #1

Warmth

Dryness

#10

Sun

Sea warmth

Published best categories: City break, Active

Colourful wharf houses on the river in Trondheim

Trondheim · JulyPhoto: David Stanley from Nanaimo, Canada · CC BY 4.0

Average high: 18 °C
Average low: 10 °C
Sea: 13 °C
Rainy days (est.): 20 rainy days (est.)
Sun (est.): 6 h/day
Humidity: 83 %

Climate evidence with direct month comparison

The highlighted row is the selected month. Precipitation total and rainy days are separate monthly averages.

Climate averages for Trondheim: selected and adjacent months
Month	Avg high °C	Avg low °C	Rainy days (est.)	Precipitation mm	Sun h/day (est.)	Humidity %	Wind m/s	Sea °C	Score
June	15	7	20	141	6.1	81	0.6	11	32
July (selected)	18	10	20	135	5.7	83	0.5	13	39
August	16	10	20	149	4.4	86	0.6	14	34

How do the previous and next months compare?

Baseline: July (39/100)

Positive and negative values show the change from the selected month.

	Score Δ	Average high Δ	Average low Δ	Rainy days Δ	Rain Δ	Sun Δ	Humidity Δ	Wind Δ	Sea Δ
June	-7	-2.7 °C	-2.8 °C	-0.4	+6.5 mm	+0.4 h	-2.1 %	+0.1 m/s	-2.4 °C
August	-5	-1.1 °C	-0.4 °C	+0.3	+14.2 mm	-1.3 h	+3.1 %	+0.1 m/s	+0.8 °C

All twelve months in context

JanUnsuitable9 FebUnsuitable12 MarUnsuitable13 AprUnsuitable21 MayUnsuitable26 JunUnsuitable32 JulUnsuitable39 AugUnsuitable34 SepUnsuitable25 OctUnsuitable13 NovUnsuitable12 DecUnsuitable9

Rainy days (estimated)

Sunshine hours (estimated)h/day

Average daily high°C

-2

-1

Sea temperature°C

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Where to stay in Trondheim

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Useful next decisions

Trondheim · Month by month

Bergen · July Helsinki · July Tallinn · July Ålesund · July

Trondheim or Bergen · July

Frequently asked questions

How warm is Trondheim in July?

The average daily high is around 18 °C, with an average daily low of about 10 °C.

Can you swim in Trondheim in July?

The sea is about 13 °C (cold).

Does it rain a lot in Trondheim in July?

The curated estimate is about 20 rainy days per month, not a directly measured long-term average. Total precipitation averages around 135 mm for the month. A rainy day does not mean all-day rain.

When is the best time to visit Trondheim?

No month in Trondheim reaches the threshold for a clear recommendation in the climate score; the month comparison above shows the differences.