Luleå, Sweden climate

Dfc Subarctic

Luleå has a strongly seasonal cold-temperate climate (Subarctic, Köppen Dfc). The hottest month is July with an average daily high near 21°C, while the coldest is January averaging around −12°C at night. Around 606 mm of precipitation falls each year, peaking in August (65 mm) and easing off in March (30 mm). At latitude 66°N, day length swings from 2.4 hours in midwinter to 21.6 hours at midsummer.

☀️ Summers

Mild

Highs near 21°C in July.

❄️ Winters

Very cold

Lows near −12°C in January.

About 168 freezing nights a year

🌧️ Rain

Moderate rainfall

About 606 mm of rain a year.

Wettest in August

⛅ Sky & trend

Often cloudy

Cloudy skies much of the year.

+2.0 °C vs 50 years ago

Temperature & precipitation

Daily high–low temperature range with the monthly average, plus monthly precipitation · 1991–2020 normals · hover a month for the exact figures

Clear vs cloudy days

Share of days each month that are clear, partly cloudy or cloudy · 1991–2020 · hover a month for the day counts

Luleå climate normals (1991–2020)

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Avg high (°C)	−5	−5	0	6	12	17	21	18	13	6	0	−3
Avg temp (°C)	−9	−9	−4	2	8	13	17	15	10	3	−3	−6
Avg low (°C)	−12	−12	−8	−2	3	9	13	11	7	0	−5	−9
Precipitation (mm)	55	37	30	32	41	53	57	65	62	53	59	62

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Avg high (°C)	−5	−5	0	6	12	17
Avg temp (°C)	−9	−9	−4	2	8	13
Avg low (°C)	−12	−12	−8	−2	3	9
Precipitation (mm)	55	37	30	32	41	53

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Avg high (°C)	21	18	13	6	0	−3
Avg temp (°C)	17	15	10	3	−3	−6
Avg low (°C)	13	11	7	0	−5	−9
Precipitation (mm)	57	65	62	53	59	62

How often — frequency of weather events

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Days with measurable rain (days)	15	12	10	8	10	10	11	11	12	13	15	16
Days with low ≤ 0°C (days)	26	25	26	22	6	0.1	—	0.1	2	14	24	23

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Days with measurable rain (days)	15	12	10	8	10	10
Days with low ≤ 0°C (days)	26	25	26	22	6	0.1

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Days with measurable rain (days)	11	11	12	13	15	16
Days with low ≤ 0°C (days)	—	0.1	2	14	24	23

Sky & atmosphere

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Cloud cover (%)	77	73	69	69	65	66	64	66	69	75	77	78
Clear days (≤ 30% cloud)	0.7	1	2	2	3	3	5	4	3	2	1	0.3
Partly cloudy days (30–70%)	9	10	13	12	14	12	12	12	10	10	9	10
Cloudy days (≥ 70%)	21	17	16	16	14	15	15	16	17	20	20	21
Relative humidity (%)	99	99	97	88	78	75	78	82	87	93	97	98
Wind speed (mph)	3.8	3.4	3.2	2.7	2.4	2.3	2.5	3.0	3.5	3.6	3.7	3.9

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Cloud cover (%)	77	73	69	69	65	66
Clear days (≤ 30% cloud)	0.7	1	2	2	3	3
Partly cloudy days (30–70%)	9	10	13	12	14	12
Cloudy days (≥ 70%)	21	17	16	16	14	15
Relative humidity (%)	99	99	97	88	78	75
Wind speed (mph)	3.8	3.4	3.2	2.7	2.4	2.3

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Cloud cover (%)	64	66	69	75	77	78
Clear days (≤ 30% cloud)	5	4	3	2	1	0.3
Partly cloudy days (30–70%)	12	12	10	10	9	10
Cloudy days (≥ 70%)	15	16	17	20	20	21
Relative humidity (%)	78	82	87	93	97	98
Wind speed (mph)	2.5	3.0	3.5	3.6	3.7	3.9

Methodology & sources

Temperature & precipitation — 1991–2020 normals computed from 16 years of daily observations at Lulea-bergnaset, a weather station, about 2 km from the city centre. The underlying daily records come from NOAA's global station network.

Cloud, humidity, wind & sunshine — modelled estimates from NASA POWER, NASA's satellite-and-reanalysis climatology. This is the standard global source for atmospheric variables, which are not measured at most weather stations.

How we build these numbers →