Russia · 1991–2020

Best time to visit
Ayan.

August leads for comfortable weather in Ayan: typically 17.5°C by day, 10.8°C at night, with 169 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortAugust

Typical high17.5°C

Typical low10.8°C

Rain in August169 mm

Comfort

August

August · July · September

45climate match

Beach

January

January · February · March

5climate match

Outdoors

August

August · July · June

59climate match

The weakest month is January, scoring 5 against August’s 45 — days reach only -13.2°C, 37° 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

5-13.2° / -20.5°

Feb

5-11.8° / -19.9°

Mar

5-5.5° / -14.7°

Apr

50.7° / -6.4°

May

55.9° / -0.4°

Jun

2811.6° / 4.9°

Jul

4015.6° / 10°

Aug

4517.5° / 10.8°

Sep

2913.8° / 5.8°

Oct

54.9° / -2.5°

Nov

5-6.6° / -13.4°

Dec

5-12.8° / -19.5°

Monthly climate evidence for Ayan — daylight is calculated from latitude, everything else is measured, sea temperature from the nearest open water 10 km away
Month	Day	Night	Rain	Wet days	Sea	Daylight	Comfort	Coverage
January	-13.2°C	-20.5°C	27 mm	4	-0.6°C	7 h 28	5	Strong coverage
February	-11.8°C	-19.9°C	13 mm	2.9	-0.6°C	9 h 25	5	Strong coverage
March	-5.5°C	-14.7°C	28 mm	4.4	-0.7°C	11 h 37	5	Strong coverage
April	0.7°C	-6.4°C	44 mm	7	-0.7°C	14 h 07	5	Strong coverage
May	5.9°C	-0.4°C	101 mm	9.1	0.6°C	16 h 21	5	Strong coverage
June	11.6°C	4.9°C	94 mm	8.1	5.4°C	17 h 42	28	Strong coverage
July	15.6°C	10°C	154 mm	10.2	11.4°C	17 h 09	40	Strong coverage
August	17.5°C	10.8°C	169 mm	10.7	13.6°C	15 h 08	45	Strong coverage
September	13.8°C	5.8°C	145 mm	8.7	11.5°C	12 h 40	29	Strong coverage
October	4.9°C	-2.5°C	108 mm	7.6	6.7°C	10 h 16	5	Strong coverage
November	-6.6°C	-13.4°C	54 mm	5.4	1.8°C	8 h 03	5	Strong coverage
December	-12.8°C	-19.5°C	28 mm	4.2	-0.3°C	6 h 53	5	Strong coverage

What has changed

Ayan runs +1.1°C
on the 1961–1990 baseline.

Each bar compares the 2011–2025 daytime average for that month against the same month in 1961–1990, measured at the same station. Months where the older record is too thin to compare are left blank.

Jan

+1.6

Feb

+0.8

Mar

+1.4

Apr

+1.1

May

+0.9

Jun

+0.8

Jul

+1.3

Aug

+1.1

Sep

+1.1

Oct

+1.2

Nov

+1.1

Dec

+0.4

August daytime highs, 2011–2025. Last recorded: 17.9°C.

Records at AJAN, 1931–2025
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	2.7°C2 Jan 1979	-37.9°C21 Jan 1996	39 mm27 Jan 1999	102 mm2012 · driest 0 mm in 1937	94
February	2.8°C28 Feb 1990	-35.6°C6 Feb 1944	21 mm1 Feb 1970	56 mm2010 · driest 0 mm in 2001	94
March	10.6°C30 Mar 1990	-31.0°C11 Mar 1954	45 mm23 Mar 1975	193 mm1966 · driest 0 mm in 1957	94
April	17.5°C27 Apr 1979	-23.5°C4 Apr 1999	56 mm4 Apr 1962	186 mm1983 · driest 0 mm in 1939	93
May	30.3°C26 May 1990	-14.7°C3 May 1946	100 mm18 May 2025	289 mm2019 · driest 5 mm in 2011	94
June	33.7°C30 Jun 2008	-4.2°C1 Jun 1954	118 mm24 Jun 1981	397 mm2009 · driest 0 mm in 1954	94
July	33.2°C24 Jul 1934	0.4°C1 Jul 1966	191 mm31 Jul 2007	556 mm2014 · driest 5 mm in 1954	94
August	30.7°C26 Aug 2010	0.9°C29 Aug 2016	235 mm8 Aug 2022	714 mm1981 · driest 4 mm in 1998	94
September	27.2°C3 Sep 2010	-6.7°C23 Sep 1976	235 mm4 Sep 1983	608 mm1983 · driest 15 mm in 1973	93
October	20.0°C12 Oct 2023	-20.2°C28 Oct 1964	100 mm18 Oct 2012	408 mm2009 · driest 0 mm in 1960	93
November	10.0°C3 Nov 1978	-29.6°C14 Nov 1950	104 mm7 Nov 2004	230 mm2005 · driest 0 mm in 2017	94
December	4.6°C1 Dec 1989	-34.7°C24 Dec 1996	40 mm4 Dec 1980	222 mm1980 · driest 0 mm in 1995	93

Typical days per month at AJAN, 1991–2020
Month	Days 25°C+	Frost nights	Heavy rain (10 mm+)
January	0	31	<1
February	0	28	<1
March	0	31	<1
April	0	30	1
May	0	18	4
June	<1	2	3
July	1	0	4
August	1	0	5
September	<1	2	4
October	0	22	3
November	0	30	1
December	0	31	<1

How often, not how much — every day in AJAN’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%	10%	2%	10%	-18.3–-11.1°C
February	0%	10%	<1%	9%	-15.4–-9.6°C
March	0%	12%	2%	13%	-8.6–-3.7°C
April	0%	21%	5%	25%	-1.6–3.1°C
May	<1%	28%	9%	33%	2.9–7.2°C
June	7%	27%	9%	32%	8.0–13.5°C
July	13%	31%	12%	40%	12.9–17.8°C
August	18%	33%	14%	42%	14.9–18.8°C
September	4%	29%	13%	33%	11.8–14.8°C
October	0%	21%	8%	22%	2.4–6.9°C
November	0%	17%	4%	18%	-10.3–-4.0°C
December	0%	13%	2%	11%	-16.8–-10.0°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.

1934Each stripe is one year’s mean temperature against the 90-year average. Warmest: 1990. Coolest: 1941.2024

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 2027316
NOAA station: RSM00031168 · AJAN
Station distance: 2.2 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 30 usable years
Daylight: Calculated from latitude 56.46°, mid-month, sunrise to sunset including refraction. Not a station measurement.
Sea temperature: NOAA OISST v2.1 1991–2020 monthly climatology, nearest open water 10 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 AJAN is what differs

Uyka→Nurki→Munnuk→Lantar’→Kochekit→Karamzina→

Or put two places side by side: Ayan vs Uyka

Best time to visitAyan.

August

January

August

The whole year,without the guesswork.

Ayan runs +1.1°Con the 1961–1990 baseline.

Nearby, measured,and named.

Best time to visit
Ayan.

The whole year,
without the guesswork.

Ayan runs +1.1°C
on the 1961–1990 baseline.

Nearby, measured,
and named.