United States · 1991–2020

Best time to visit
Hayden.

September leads for comfortable weather in Hayden: typically 24.1°C by day, 5°C at night, with 42 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortSeptember

Typical high24.1°C

Typical low5°C

Rain in September42 mm

Comfort

September

September · June · August

77climate match

Beach

July

July · August · June

64climate match

Outdoors

May

May · September · June

78climate match

The weakest month is January, scoring 5 against September’s 77 — days reach only -1°C, 25° below the 24°C the score treats as ideal, and nights drop to -12.9°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

5-1° / -12.9°

Feb

51.7° / -10.7°

Mar

88.4° / -5.6°

Apr

3114.6° / -1.4°

May

5920.3° / 2.8°

Jun

7526.2° / 6.5°

Jul

6929.9° / 10.2°

Aug

7228.6° / 9.6°

Sep

7724.1° / 5°

Oct

4216.4° / -0.9°

Nov

57.4° / -6.5°

Dec

5-0.4° / -12.1°

Monthly climate evidence for Hayden — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	-1°C	-12.9°C	46 mm	10.1	9 h 34	5	Strong coverage
February	1.7°C	-10.7°C	36 mm	8.3	10 h 36	5	Strong coverage
March	8.4°C	-5.6°C	35 mm	7.4	11 h 49	8	Strong coverage
April	14.6°C	-1.4°C	55 mm	9.3	13 h 13	31	Strong coverage
May	20.3°C	2.8°C	47 mm	8.6	14 h 24	59	Strong coverage
June	26.2°C	6.5°C	28 mm	5.1	15 h 03	75	Strong coverage
July	29.9°C	10.2°C	28 mm	5.9	14 h 48	69	Strong coverage
August	28.6°C	9.6°C	32 mm	6.3	13 h 47	72	Strong coverage
September	24.1°C	5°C	42 mm	6.7	12 h 25	77	Strong coverage
October	16.4°C	-0.9°C	40 mm	6.9	11 h 03	42	Strong coverage
November	7.4°C	-6.5°C	38 mm	7.3	9 h 52	5	Strong coverage
December	-0.4°C	-12.1°C	42 mm	8.8	9 h 17	5	Strong coverage

What has changed

Hayden runs +0.8°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

0.0

Feb

0.0

Mar

+2.2

Apr

+0.6

May

+0.1

Jun

+1.5

Jul

+0.7

Aug

+0.9

Sep

+2.0

Oct

+0.1

Nov

+1.2

Dec

+0.6

September daytime highs, 2011–2025. Last recorded: 24.7°C.

Records at HAYDEN, 1909–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	15.6°C23 Jan 1981	-42.8°C12 Jan 1963	27 mm18 Jan 2019	96 mm2023 · driest 5 mm in 1925	110
February	16.1°C25 Feb 1981	-42.2°C6 Feb 1989	32 mm3 Feb 2024	85 mm2024 · driest 4 mm in 1915	109
March	27.8°C25 Mar 2026	-31.7°C11 Mar 1948	29 mm26 Mar 1932	93 mm1932 · driest 1 mm in 1915	110
April	28.9°C23 Apr 1930	-20.6°C4 Apr 1945	40 mm23 Apr 2003	114 mm2011 · driest 9 mm in 1913	112
May	33.3°C31 May 2002	-9.4°C1 May 1972	34 mm26 May 1992	111 mm2015 · driest 2 mm in 1909	109
June	37.8°C14 Jun 1956	-6.1°C1 Jun 1922	52 mm21 Jun 2019	91 mm2019 · driest 0 mm in 1940	108
July	38.9°C26 Jul 1931	-2.8°C3 Jul 1921	38 mm7 Jul 2015	88 mm1992 · driest 3 mm in 1958	109
August	36.7°C17 Aug 1913	-2.2°C24 Aug 1972	51 mm3 Aug 1916	109 mm1916 · driest 4 mm in 1944	107
September	34.4°C7 Sep 2022	-13.9°C25 Sep 1926	50 mm13 Sep 1914	157 mm1997 · driest 0 mm in 1956	106
October	28.3°C2 Oct 1992	-23.3°C27 Oct 2020	39 mm20 Oct 1979	103 mm1941 · driest 0 mm in 1952	107
November	23.3°C7 Nov 1999	-32.8°C16 Nov 1955	29 mm3 Nov 1973	95 mm1985 · driest 2 mm in 1914	107
December	18.9°C3 Dec 1941	-40.6°C13 Dec 1932	46 mm30 Dec 1951	130 mm1983 · driest 2 mm in 1929	106

Typical days per month at HAYDEN, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)	Snow days
January	0	0	31	<1	12
February	0	0	28	<1	9
March	0	0	29	<1	7
April	<1	0	21	1	5
May	6	<1	7	1	1
June	21	6	<1	<1	<1
July	29	18	0	<1	0
August	28	12	<1	<1	0
September	15	2	3	1	<1
October	2	0	19	1	2
November	0	0	28	<1	7
December	0	0	31	<1	11

The best month has moved. On the 1961–1990 numbers the strongest month here was June (scoring 78); on 2011–2025 it is September (80). Both are scored the same way, from the same station — only the climate underneath changed.

How often, not how much — every day in HAYDEN’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%	29%	2%	34%	-4.0–1.9°C
February	0%	26%	2%	30%	-1.4–4.7°C
March	2%	24%	2%	24%	3.3–10.4°C
April	18%	26%	4%	27%	11.0–17.5°C
May	54%	24%	3%	26%	17.5–22.7°C
June	80%	17%	2%	14%	23.6–28.8°C
July	81%	19%	3%	19%	28.4–31.7°C
August	78%	21%	3%	21%	26.9–30.3°C
September	71%	21%	3%	20%	21.7–26.0°C
October	35%	20%	4%	20%	14.1–19.7°C
November	2%	21%	2%	23%	3.4–11.2°C
December	0%	27%	3%	32%	-2.8–4.3°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.

1915Each stripe is one year’s mean temperature against the 97-year average. Warmest: 2025. Coolest: 1929.2025

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 5577864
NOAA station: USC00053867 · HAYDEN
Station distance: 0.4 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 29 usable years
Daylight: Calculated from latitude 40.50°, 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 HAYDEN is what differs

Bear River (historical)→Elkhead→Mount Harris→

Or put two places side by side: Hayden vs Bear River (historical)

Best time to visitHayden.

September

July

May

The whole year,without the guesswork.

Hayden runs +0.8°Con the 1961–1990 baseline.

Nearby, measured,and named.

Best time to visit
Hayden.

The whole year,
without the guesswork.

Hayden runs +0.8°C
on the 1961–1990 baseline.

Nearby, measured,
and named.