Norway

Oslo in September: weather & travel advice

This month's data profile

Rain shapes the decision

Oslo in September is climatically mixed. The average daily high is around 14 °C. With about 13 rainy days it is wet.

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

Rank among 12 monthly averages

46/100 · #5

Warmth

Dryness

Sun

Published best categories: none

Oslo · SeptemberPhoto: JopkeB · CC BY-SA 4.0

Average high: 14 °C
Average low: 7 °C
Rainy days (est.): 13 rainy days (est.)
Sun (est.): 3 h/day
Humidity: 87 %

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 Oslo: selected and adjacent months
Month	Avg high °C	Avg low °C	Rainy days (est.)	Precipitation mm	Sun h/day (est.)	Humidity %	Wind m/s	Score
August	19	11	16	116	5.0	84	0.3	56
September (selected)	14	7	13	99	3.2	87	0.4	46
October	8	2	15	104	1.4	93	0.3	25

How do the previous and next months compare?

Baseline: September (46/100)

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
August	+10	+4.4 °C	+3.8 °C	+3.7	+16.5 mm	+1.8 h	-3.5 %	±0 m/s
October	-21	-6.7 °C	-4.8 °C	+2.3	+5.3 mm	-1.8 h	+5.5 %	±0 m/s

All twelve months in context

JanUnsuitable22 FebUnsuitable28 MarUnsuitable32 AprUnsuitable41 MayLimited50 JunLimited61 JulLimited61 AugLimited56 SepLimited46 OctUnsuitable25 NovUnsuitable19 DecUnsuitable21

Rainy days (estimated)

Sunshine hours (estimated)h/day

Average daily high°C

-4

-2

-3

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Where to stay in Oslo

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Useful next decisions

Oslo · Month by month

Cortina d'Ampezzo · September Chamonix · September Bolzano · September Saas-Fee · September

Frequently asked questions

How warm is Oslo in September?

The average daily high is around 14 °C, with an average daily low of about 7 °C.

Does it rain a lot in Oslo in September?

The curated estimate is about 13 rainy days per month, not a directly measured long-term average. Total precipitation averages around 99 mm for the month. A rainy day does not mean all-day rain.

When is the best time to visit Oslo?

By the climate score, June and July are the strongest months for Oslo. September is not among them.