United States · 1991–2020

Best time to visit
Henley.

May leads for comfortable weather in Henley: typically 22.9°C by day, 4.8°C at night, with 26 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortMay

Typical high22.9°C

Typical low4.8°C

Rain in May26 mm

Comfort

May

May · June · September

76climate match

Beach

June

June · July · August

62climate match

Outdoors

October

October · May · April

85climate match

The weakest month is December, scoring 5 against May’s 76 — days reach only 7°C, 17° 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

107.7° / -3.2°

Feb

2210.7° / -2.9°

Mar

3513.9° / -0.9°

Apr

5017.1° / 1°

May

7622.9° / 4.8°

Jun

7528° / 8.6°

Jul

6334.1° / 12.8°

Aug

6433° / 11.6°

Sep

7128.5° / 7.3°

Oct

6520.4° / 2.2°

Nov

2711.9° / -1.5°

Dec

57° / -3.3°

Monthly climate evidence for Henley — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	7.7°C	-3.2°C	37 mm	6.8	9 h 26	10	Good coverage
February	10.7°C	-2.9°C	33 mm	5.3	10 h 31	22	Good coverage
March	13.9°C	-0.9°C	33 mm	6.8	11 h 48	35	Good coverage
April	17.1°C	1°C	26 mm	5.6	13 h 17	50	Good coverage
May	22.9°C	4.8°C	26 mm	5	14 h 32	76	Good coverage
June	28°C	8.6°C	12 mm	2.3	15 h 12	75	Good coverage
July	34.1°C	12.8°C	5 mm	1	14 h 56	63	Good coverage
August	33°C	11.6°C	6 mm	0.7	13 h 52	64	Good coverage
September	28.5°C	7.3°C	6 mm	1	12 h 26	71	Good coverage
October	20.4°C	2.2°C	23 mm	3.3	11 h 00	65	Good coverage
November	11.9°C	-1.5°C	37 mm	6.1	9 h 45	27	Good coverage
December	7°C	-3.3°C	60 mm	8.2	9 h 09	5	Good coverage

Records at MONTAGUE SISKIYOU AP, 1948–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	19.4°C29 Jan 2024	-25.5°C6 Jan 2017	34 mm14 Jan 1952	104 mm1950 · driest 0 mm in 2025	31
February	22.2°C9 Feb 2022	-25.0°C2 Feb 1950	39 mm6 Feb 2015	95 mm2019 · driest 0 mm in 2022	30
March	27.2°C18 Mar 2026	-11.6°C31 Mar 2008	27 mm15 Mar 2011	100 mm2011 · driest 3 mm in 1951	30
April	32.2°C21 Apr 2009	-9.4°C5 Apr 2001	27 mm30 Apr 2002	67 mm2010 · driest 2 mm in 2020	30
May	36.7°C28 May 2020	-7.1°C1 May 2008	22 mm4 May 2024	68 mm2005 · driest 1 mm in 2021	30
June	42.8°C27 Jun 2021	-3.3°C12 Jun 1952	23 mm20 Jun 2009	77 mm2009 · driest 0 mm in 2024	30
July	43.9°C6 Jul 2024	4.4°C1 Jul 2026	21 mm31 Jul 2011	36 mm2011 · driest 0 mm in 1950	31
August	41.7°C14 Aug 2023	2.8°C31 Aug 2008	45 mm5 Aug 2020	45 mm2020 · driest 0 mm in 2002	29
September	41.1°C6 Sep 2022	-2.8°C30 Sep 1950	25 mm24 Sep 2014	35 mm2014 · driest 0 mm in 2024	29
October	33.3°C6 Oct 2022	-11.1°C31 Oct 2002	37 mm25 Oct 2010	106 mm2016 · driest 0 mm in 2024	30
November	25.0°C2 Nov 1949	-13.2°C29 Nov 2015	38 mm7 Nov 2005	135 mm2005 · driest 0 mm in 2024	30
December	18.9°C10 Dec 1950	-22.7°C9 Dec 2013	54 mm30 Dec 2005	162 mm2005 · driest 0 mm in 2024	30

Typical days per month at MONTAGUE SISKIYOU AP, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)
January	0	0	25	<1
February	0	0	22	1
March	<1	0	20	<1
April	3	<1	12	<1
May	12	4	4	<1
June	22	13	<1	<1
July	31	27	0	<1
August	30	26	0	<1
September	22	15	<1	<1
October	7	1	11	<1
November	0	0	20	<1
December	0	0	24	2

How often, not how much — every day in MONTAGUE SISKIYOU AP’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%	21%	3%	22%	4.2–10.1°C
February	1%	19%	3%	19%	8.6–12.5°C
March	14%	19%	2%	17%	10.6–17.0°C
April	39%	16%	1%	13%	15.2–21.0°C
May	65%	14%	2%	12%	21.4–25.3°C
June	85%	8%	<1%	5%	25.1–30.2°C
July	97%	3%	<1%	1%	32.3–36.3°C
August	97%	3%	<1%	<1%	31.6–34.8°C
September	90%	5%	<1%	2%	26.2–30.8°C
October	53%	11%	2%	11%	18.2–24.0°C
November	5%	18%	3%	17%	9.7–14.0°C
December	0%	26%	6%	32%	4.6–8.7°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.

1949Each stripe is one year’s mean temperature against the 28-year average. Warmest: 2014. Coolest: 2011.2025

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 5564993
NOAA station: USW00024259 · MONTAGUE SISKIYOU AP
Station distance: 16.3 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 20 usable years
Daylight: Calculated from latitude 41.90°, 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 MONTAGUE SISKIYOU AP is what differs

Montague→Hornbrook→Ager→Big Springs→Jims Camp→Little Shasta→

Or put two places side by side: Henley vs Montague

Best time to visitHenley.

May

June

October

The whole year,without the guesswork.

Nearby, measured,and named.

Best time to visit
Henley.

The whole year,
without the guesswork.

Nearby, measured,
and named.