Sweden · 1991–2020

Best time to visit
Viby.

July leads for comfortable weather in Viby: typically 22.4°C by day, 11°C at night, with 70 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortJuly

Typical high22.4°C

Typical low11°C

Rain in July70 mm

Comfort

July

July · August · June

77climate match

Beach

July

July · August · June

40climate match

Outdoors

June

June · August · July

86climate match

The weakest month is January, scoring 5 against July’s 77 — days reach only -0.7°C, 25° 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

5-0.7° / -7°

Feb

50.4° / -6.9°

Mar

54.2° / -4.6°

Apr

2410.3° / -0.5°

May

4815.6° / 3.9°

Jun

6620° / 8.4°

Jul

7722.4° / 11°

Aug

7221.2° / 10.1°

Sep

5316.2° / 6.5°

Oct

219.5° / 2.2°

Nov

53.9° / -1.2°

Dec

50.5° / -5.4°

Monthly climate evidence for Viby — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	-0.7°C	-7°C	34 mm	8.3	6 h 38	5	Strong coverage
February	0.4°C	-6.9°C	28 mm	7.6	9 h	5	Strong coverage
March	4.2°C	-4.6°C	28 mm	6.6	11 h 33	5	Strong coverage
April	10.3°C	-0.5°C	28 mm	6.4	14 h 27	24	Strong coverage
May	15.6°C	3.9°C	38 mm	7.5	17 h 07	48	Strong coverage
June	20°C	8.4°C	62 mm	8.8	18 h 50	66	Strong coverage
July	22.4°C	11°C	70 mm	9.4	18 h 07	77	Strong coverage
August	21.2°C	10.1°C	66 mm	9.2	15 h 39	72	Strong coverage
September	16.2°C	6.5°C	46 mm	7.5	12 h 46	53	Strong coverage
October	9.5°C	2.2°C	54 mm	8.7	9 h 59	21	Strong coverage
November	3.9°C	-1.2°C	48 mm	10.4	7 h 22	5	Strong coverage
December	0.5°C	-5.4°C	44 mm	10	5 h 53	5	Strong coverage

Records at KERSTINBO_A, 1995–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	9.6°C8 Jan 2020	-31.1°C6 Jan 2010	15 mm24 Jan 2002	78 mm2015 · driest 8 mm in 2006	31
February	12.4°C29 Feb 2012	-28.6°C24 Feb 2011	22 mm16 Feb 2024	53 mm2024 · driest 7 mm in 2025	31
March	18.6°C27 Mar 2017	-27.0°C2 Mar 2005	15 mm14 Mar 2014	73 mm2002 · driest 3 mm in 2013	31
April	24.0°C29 Apr 2000	-11.7°C9 Apr 2013	23 mm17 Apr 1999	79 mm1999 · driest 5 mm in 2009	31
May	28.4°C29 May 2018	-6.5°C9 May 2017	27 mm26 May 2021	88 mm2021 · driest 8 mm in 2018	31
June	30.9°C27 Jun 2022	-1.9°C6 Jun 2009	43 mm16 Jun 2020	137 mm2009 · driest 7 mm in 2001	31
July	33.5°C21 Jul 2022	0.3°C9 Jul 2008	99 mm20 Jul 2002	204 mm2002 · driest 16 mm in 2014	30
August	34.0°C4 Aug 2014	-1.5°C31 Aug 2007	77 mm9 Aug 1999	215 mm2023 · driest 15 mm in 2002	31
September	27.0°C8 Sep 2024	-7.0°C30 Sep 2001	87 mm1 Sep 2023	125 mm2023 · driest 11 mm in 2016	31
October	20.9°C9 Oct 1995	-12.5°C19 Oct 2002	32 mm8 Oct 2017	135 mm2017 · driest 1 mm in 2015	31
November	15.7°C2 Nov 2020	-21.6°C30 Nov 2010	27 mm19 Nov 1996	114 mm2000 · driest 6 mm in 2018	31
December	12.5°C20 Dec 2015	-29.7°C23 Dec 2001	24 mm6 Dec 1998	90 mm1998 · driest 9 mm in 2002	31

Typical days per month at KERSTINBO_A, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)
January	0	0	26	<1
February	0	0	25	<1
March	0	0	26	<1
April	0	0	17	<1
May	<1	0	6	1
June	4	<1	<1	2
July	7	<1	0	2
August	5	<1	<1	2
September	<1	0	3	1
October	0	0	10	2
November	0	0	17	<1
December	0	0	24	<1

How often, not how much — every day in KERSTINBO_A’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%	27%	1%	34%	-2.8–1.8°C
February	0%	26%	<1%	31%	-2.9–3.1°C
March	0%	20%	<1%	20%	1.7–7.6°C
April	3%	22%	1%	24%	8.2–12.6°C
May	18%	24%	3%	28%	13.8–17.4°C
June	42%	30%	6%	39%	17.8–22.5°C
July	56%	32%	7%	41%	20.1–25.2°C
August	49%	30%	7%	36%	19.3–23.0°C
September	13%	25%	4%	31%	14.5–18.3°C
October	<1%	28%	5%	37%	7.3–11.6°C
November	0%	33%	3%	45%	0.9–5.9°C
December	0%	32%	2%	43%	-3.6–4.1°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.

1996Each stripe is one year’s mean temperature against the 30-year average. Warmest: 2020. Coolest: 2010.2025

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 2663237
NOAA station: SWE00139306 · KERSTINBO_A
Station distance: 22.5 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 25 usable years
Daylight: Calculated from latitude 60.10°, mid-month, sunrise to sunset including refraction. Not a station measurement.
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 KERSTINBO_A is what differs

Tierp→Söderfors→Östervåla→Tärnsjö→Hedesunda→Årsunda→

Or put two places side by side: Viby vs Tierp

Best time to visitViby.

July

July

June

The whole year,without the guesswork.

Nearby, measured,and named.

Best time to visit
Viby.

The whole year,
without the guesswork.

Nearby, measured,
and named.