Sweden · 1991–2020

Best time to visit
Sundom.

July leads for comfortable weather in Sundom: typically 21.3°C by day, 9.7°C at night, with 69 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortJuly

Typical high21.3°C

Typical low9.7°C

Rain in July69 mm

Comfort

July

July · August · June

70climate match

Beach

July

July · August · June

32climate match

Outdoors

July

July · August · June

81climate match

The weakest month is January, scoring 5 against July’s 70 — days reach only -6.3°C, 30° below the 24°C the score treats as ideal.

Month by month

The whole year,
without the guesswork.

The bars show the comfort score. Day and night temperatures come from daily observed highs and lows; rain is the historical monthly estimate.

Jan

5-6.3° / -16.1°

Feb

5-6.8° / -17.7°

Mar

5-0.4° / -11.8°

Apr

55.5° / -4.7°

May

3212.6° / 0.7°

Jun

5818.6° / 6.6°

Jul

7021.3° / 9.7°

Aug

6018.9° / 7.8°

Sep

3413° / 2.8°

Oct

54.9° / -2.7°

Nov

5-1.9° / -9.1°

Dec

5-5.3° / -14.1°

Monthly climate evidence for Sundom — daylight is calculated from latitude, everything else is measured, sea temperature from the nearest open water 13 km away
Month	Day	Night	Rain	Wet days	Sea	Daylight	Comfort	Coverage
January	-6.3°C	-16.1°C	50 mm	9.6	-0.2°C	4 h 32	5	Good coverage
February	-6.8°C	-17.7°C	33 mm	7.9	-0.2°C	8 h 04	5	Good coverage
March	-0.4°C	-11.8°C	33 mm	7.7	0.0°C	11 h 24	5	Good coverage
April	5.5°C	-4.7°C	30 mm	6.3	0.5°C	15 h 09	5	Good coverage
May	12.6°C	0.7°C	40 mm	7.6	3.9°C	18 h 58	32	Good coverage
June	18.6°C	6.6°C	61 mm	8.9	10.3°C	23 h 15	58	Good coverage
July	21.3°C	9.7°C	69 mm	10.6	14.9°C	20 h 50	70	Good coverage
August	18.9°C	7.8°C	69 mm	9	15.4°C	16 h 46	60	Good coverage
September	13°C	2.8°C	56 mm	8.2	11.9°C	12 h 58	34	Good coverage
October	4.9°C	-2.7°C	49 mm	8.6	7.5°C	9 h 23	5	Good coverage
November	-1.9°C	-9.1°C	59 mm	11.1	3.9°C	5 h 44	5	Good coverage
December	-5.3°C	-14.1°C	46 mm	9.6	1.2°C	3 h 06	5	Good coverage

Records at ORRBYN, 1964–2011
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	10.6°C11 Jan 1971	-44.2°C28 Jan 1999	37 mm29 Jan 2000	95 mm2008 · driest 4 mm in 1996	47
February	10.0°C23 Feb 1990	-41.3°C8 Feb 1966	15 mm13 Feb 1973	71 mm2002 · driest 4 mm in 1986	47
March	12.2°C28 Mar 2007	-36.9°C3 Mar 1971	27 mm28 Mar 1989	75 mm1965 · driest 2 mm in 1974	47
April	18.0°C20 Apr 2003	-25.0°C8 Apr 1965	22 mm18 Apr 1971	68 mm2000 · driest 2 mm in 1974	47
May	29.6°C31 May 1971	-10.3°C1 May 1967	27 mm19 May 2001	88 mm1982 · driest 5 mm in 1978	46
June	31.8°C20 Jun 1966	-2.9°C2 Jun 1975	36 mm20 Jun 2011	103 mm1987 · driest 1 mm in 1970	47
July	32.4°C17 Jul 2003	-0.2°C17 Jul 1975	41 mm30 Jul 1984	144 mm1998 · driest 14 mm in 1972	46
August	31.1°C6 Aug 1969	-2.6°C31 Aug 1972	62 mm11 Aug 1993	156 mm1992 · driest 6 mm in 1976	46
September	23.9°C6 Sep 1999	-10.7°C26 Sep 1968	51 mm17 Sep 1978	132 mm1970 · driest 13 mm in 1999	47
October	17.4°C9 Oct 1995	-25.3°C28 Oct 1968	41 mm7 Oct 1980	130 mm1980 · driest 15 mm in 1969	47
November	12.0°C9 Nov 1975	-35.6°C21 Nov 1971	39 mm10 Nov 1972	120 mm2006 · driest 7 mm in 1988	47
December	9.0°C2 Dec 1989	-37.9°C9 Dec 1973	33 mm18 Dec 1966	138 mm1993 · driest 6 mm in 1978	47

Typical days per month at ORRBYN, 1991–2020
Month	Days 25°C+	Frost nights	Heavy rain (10 mm+)
January	0	31	1
February	0	28	<1
March	0	30	<1
April	0	25	<1
May	<1	14	<1
June	3	1	2
July	5	<1	2
August	2	1	2
September	0	9	2
October	0	21	1
November	0	27	1
December	0	30	<1

How often, not how much — every day in ORRBYN’s record sorted by what it was actually like, rather than averaged
Month	Warm & dry days	Wet days	Washouts	Week with 3+ wet days	Daytime mean has ranged
January	0%	30%	2%	40%	-13.3–-3.0°C
February	0%	26%	1%	30%	-13.1–-2.1°C
March	0%	24%	2%	28%	-4.6–2.0°C
April	0%	20%	2%	18%	2.7–6.7°C
May	6%	21%	3%	24%	10.1–14.8°C
June	29%	26%	5%	29%	16.5–21.1°C
July	46%	31%	6%	40%	19.1–23.5°C
August	27%	28%	7%	34%	16.2–21.2°C
September	3%	29%	5%	36%	10.2–14.2°C
October	0%	28%	4%	34%	2.8–7.3°C
November	0%	35%	4%	46%	-5.6–1.2°C
December	0%	30%	2%	35%	-11.4–-1.2°C

A warm and dry day reaches 20°C with under 1 mm of rain; a wet day gets 1 mm or more; a washout gets 10 mm or more. The week column is the share of seven-day stretches in that month, across the station’s whole daily record, that contained three or more wet days — the odds a week-long trip is rained on repeatedly, counted rather than modelled. The last column is the 10th to 90th percentile of that month’s daytime average across individual years: a narrow band means the average is what you will get, a wide one means the average is a midpoint between years that felt quite different.

1965Each stripe is one year’s mean temperature against the 45-year average. Warmest: 2000. Coolest: 1985.2010

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 602518
NOAA station: SWE00140650 · ORRBYN
Station distance: 21.2 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 20 usable years
Daylight: Calculated from latitude 65.77°, mid-month, sunrise to sunset including refraction. Not a station measurement.
Sea temperature: NOAA OISST v2.1 1991–2020 monthly climatology, nearest open water 13 km from the place centre. A sheltered bay can run warmer than the open sea it is measured from.
Important limit: Historical climate is not a forecast. Nearby stations can miss mountains, coasts, and local microclimates.

These places read the same station, so their numbers are identical — distance from ORRBYN is what differs

Boden→Sävast→Råneå→Töre→Långvik→Vittjärv→

Or put two places side by side: Sundom vs Boden

Best time to visitSundom.

July

July

July

The whole year,without the guesswork.

Nearby, measured,and named.

Best time to visit
Sundom.

The whole year,
without the guesswork.

Nearby, measured,
and named.