Climate Chart of Oslo, Norway

Monthly data: Temperature °C, Rain (mm), Sunshine (h) · 2013–2023

For Oslo, Norway, the climate data cover 2013–2023. Monthly mean temperatures range from January at -2.9 °C to July at 18.0 °C, giving a broad sense of the contrast in average conditions across the year. Rainfall and sunshine also vary by month, while the snowfall figures add a separate winter consideration. These averages describe typical monthly conditions, not what any particular day will bring.

Climate overview

Temperature

The lowest monthly mean temperature is in January, at -2.9 °C, while the highest is in July, at 18.0 °C. These are monthly averages rather than daytime highs, so they frame the broad temperature pattern without describing the full range visitors may encounter within a day. Across the calendar months, the unweighted mean of monthly mean temperatures is 7.2 °C. It is a summary of the monthly averages, not a day-weighted annual average.

Snow

Mean daily snowfall is highest in January, at 12.39 mm/day. This is a daily mean, not a monthly total, and by itself does not establish the number of snowy days, snow depth, snow cover or skiing conditions. The unweighted mean of the monthly mean daily-snowfall figures is 3.86 mm/day. It summarizes the monthly averages but does not describe snow conditions on a particular day.

Rain

Mean daily rainfall is highest in September, at 3.74 mm/day, and lowest in March, at 0.67 mm/day. The figures are daily means for each month, not monthly rainfall totals; the lower mean does not guarantee rain-free days or indicate how often rain falls. The unweighted mean of the monthly daily-rainfall means is 2.29 mm/day. This provides an overall reference, but does not show the timing or duration of individual showers.

Sunshine

Mean daily sunshine reaches its highest monthly value in June, at 12.68 hours/day, and its lowest in December, at 1.42 hours/day. These are averages of sunshine duration, not measures of day length, and they cannot guarantee how sunny a particular visit will be. The unweighted mean of monthly mean daily sunshine is 7.06 hours/day. It is useful as a broad reference rather than a forecast for outdoor plans.

Best Travel Time Guide for Oslo, Norway: Ideal Seasons and Weather Insights

For visitors prioritising cooler monthly average temperatures, January is the relevant reference, with a monthly mean of -2.9 °C; this is not a daytime high or a promise about conditions on a specific date. Those planning outdoor sightseeing around sunshine may also consider June, when mean daily sunshine is 12.68 hours/day, while remembering that sunshine duration is not day length. If lower average rainfall is the priority, March is the conditional option, with mean daily rainfall of 0.67 mm/day. That average cannot guarantee dry days or quantify rain frequency, so adaptable plans and suitable rain protection remain sensible.

For rain preparation, note that mean daily rainfall is highest in September, at 3.74 mm/day; this is not a monthly total and does not specify how rain is distributed among days. For snow-aware planning, mean daily snowfall is highest in January, at 12.39 mm/day, but that figure alone cannot tell you whether snow will be present during a visit or indicate snow depth or cover.

Climate Data Overview for Oslo, Norway

Explore the comprehensive climate data for Oslo, Norway. This detailed table provides valuable insights into temperature variations, precipitation levels, and seasonal changes, helping you understand the unique weather patterns of this region.

Month	Average: Temperature °C	Rain (mm) / day	Snow (mm) / day	Sunshine (h) / day
Jan	-2.9	0.81	12.39	2.16
Feb	-1.5	0.97	10.07	4.22
Mar	0.9	0.67	8.09	7.11
Apr	5.8	1.39	2.17	9.90
May	11.4	2.58	0.50	10.89
Jun	16.4	2.86	0.00	12.68
Jul	18.0	3.37	0.00	12.49
Aug	16.3	3.39	0.00	10.00
Sep	13.0	3.74	0.00	7.27
Oct	7.5	3.45	0.76	4.44
Nov	2.8	2.92	3.75	2.14
Dec	-1.1	1.35	8.57	1.42
Average	7.2	2.29	3.86	7.06