Iran · 1991–2020

Best time to visit
Zanjan.

May leads for comfortable weather in Zanjan: typically 23.6°C by day, 7.8°C at night, with 37 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortMay

Typical high23.6°C

Typical low7.8°C

Rain in May37 mm

Comfort

May

May · June · September

83climate match

Beach

June

June · July · August

73climate match

Outdoors

October

October · May · April

88climate match

The weakest month is January, scoring 5 against May’s 83 — days reach only 4.6°C, 19° below the 24°C the score treats as ideal, and nights drop to -7.4°C.

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

54.6° / -7.4°

Feb

66.8° / -5°

Mar

3112.7° / -1.3°

Apr

5518° / 4°

May

8323.6° / 7.8°

Jun

7629.5° / 11.8°

Jul

7132.7° / 15.3°

Aug

7132.5° / 14.7°

Sep

7628.7° / 10.4°

Oct

7421.4° / 5.7°

Nov

3312.2° / 0.1°

Dec

87.3° / -4.9°

Monthly climate evidence for Zanjan — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	4.6°C	-7.4°C	19 mm	4.1	9 h 54	5	Good coverage
February	6.8°C	-5°C	23 mm	4.8	10 h 47	6	Good coverage
March	12.7°C	-1.3°C	35 mm	5.3	11 h 51	31	Good coverage
April	18°C	4°C	48 mm	7.2	13 h 05	55	Good coverage
May	23.6°C	7.8°C	37 mm	6	14 h 06	83	Good coverage
June	29.5°C	11.8°C	19 mm	2.2	14 h 39	76	Good coverage
July	32.7°C	15.3°C	13 mm	1.9	14 h 26	71	Good coverage
August	32.5°C	14.7°C	4 mm	0.7	13 h 33	71	Good coverage
September	28.7°C	10.4°C	4 mm	0.8	12 h 22	76	Good coverage
October	21.4°C	5.7°C	21 mm	3.4	11 h 11	74	Good coverage
November	12.2°C	0.1°C	28 mm	4.8	10 h 10	33	Good coverage
December	7.3°C	-4.9°C	24 mm	4.2	9 h 40	8	Good coverage

Records at ZANJAN, 1973–2025
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	16.9°C1 Jan 2018	-25.0°C1 Jan 2007	20 mm29 Jan 2019	43 mm2019 · driest 1 mm in 2003	27
February	20.8°C27 Feb 2016	-21.0°C12 Feb 2020	25 mm26 Feb 2008	65 mm2018 · driest 1 mm in 2000	28
March	27.2°C29 Mar 2018	-19.6°C2 Mar 1992	38 mm9 Mar 2023	89 mm2023 · driest 3 mm in 2002	28
April	30.0°C27 Apr 2008	-10.7°C4 Apr 2007	37 mm6 Apr 2011	107 mm2010 · driest 7 mm in 2021	29
May	34.4°C31 May 2024	-2.1°C18 May 2003	45 mm15 May 2007	84 mm2007 · driest 2 mm in 2001	29
June	38.2°C29 Jun 2015	1.6°C14 Jun 2000	63 mm24 Jun 2010	184 mm2010 · driest 0 mm in 2005	29
July	40.5°C10 Jul 2015	8.4°C13 Jul 1991	60 mm15 Jul 2010	96 mm2010 · driest 0 mm in 2009	32
August	39.7°C1 Aug 2019	3.0°C23 Aug 2007	22 mm18 Aug 2009	22 mm2009 · driest 0 mm in 2019	30
September	37.5°C4 Sep 2024	0.8°C30 Sep 2009	13 mm6 Sep 2000	23 mm2000 · driest 0 mm in 2014	27
October	30.6°C9 Oct 2024	-4.0°C24 Oct 2005	50 mm15 Oct 2007	60 mm1999 · driest 0 mm in 2024	28
November	25.0°C1 Nov 2006	-15.2°C20 Nov 2001	29 mm27 Nov 2020	102 mm2020 · driest 0 mm in 2010	27
December	19.9°C3 Dec 2023	-24.8°C31 Dec 2006	34 mm6 Dec 2013	68 mm2013 · driest 1 mm in 2008	26

Typical days per month at ZANJAN, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)
January	0	0	16	<1
February	0	0	14	<1
March	<1	0	11	<1
April	1	<1	3	1
May	11	1	<1	1
June	22	13	0	<1
July	26	21	0	<1
August	26	21	0	<1
September	22	11	0	<1
October	7	0	1	<1
November	0	0	9	<1
December	0	0	16	<1

How often, not how much — every day in ZANJAN’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%	14%	1%	12%	1.6–8.6°C
February	<1%	18%	2%	16%	3.6–10.4°C
March	9%	19%	3%	24%	10.1–15.9°C
April	40%	22%	4%	27%	15.4–21.2°C
May	72%	19%	4%	20%	21.9–27.1°C
June	92%	7%	1%	4%	28.0–32.8°C
July	95%	6%	<1%	5%	30.7–34.5°C
August	97%	3%	<1%	<1%	30.9–35.0°C
September	96%	2%	<1%	2%	27.1–30.9°C
October	66%	11%	1%	15%	19.7–23.4°C
November	4%	15%	2%	15%	10.6–15.1°C
December	0%	14%	2%	11%	4.4–10.9°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.

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 111453
NOAA station: IRM00040729 · ZANJAN
Station distance: 16.4 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 15 usable years
Daylight: Calculated from latitude 36.68°, 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 ZANJAN is what differs

Dīzajābād→Jūqīn→Do Asb→Zarrīnābād→Īch→Shīveh→

Or put two places side by side: Zanjan vs Dīzajābād

Best time to visitZanjan.

May

June

October

The whole year,without the guesswork.

Nearby, measured,and named.

Best time to visit
Zanjan.

The whole year,
without the guesswork.

Nearby, measured,
and named.