United States · 1991–2020

Best time to visit
Alderglen Springs.

October leads for comfortable weather in Alderglen Springs: typically 26.5°C by day, 10.1°C at night, with 44 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortOctober

Typical high26.5°C

Typical low10.1°C

Rain in October44 mm

Comfort

October

October · May · April

82climate match

Beach

June

June · September · August

71climate match

Outdoors

April

April · October · May

78climate match

The weakest month is December, scoring 12 against October’s 82 — days reach only 14.2°C, 10° below the 24°C the score treats as ideal, and 236 mm of rain falls.

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

1515° / 4.3°

Feb

2917° / 5°

Mar

4819.8° / 6.4°

Apr

7522.7° / 7.8°

May

8126.8° / 10.5°

Jun

7231.4° / 13.3°

Jul

6434.1° / 13.7°

Aug

6633.7° / 14°

Sep

7131.5° / 12.8°

Oct

8226.5° / 10.1°

Nov

5118.8° / 6.4°

Dec

1214.2° / 3.8°

Monthly climate evidence for Alderglen Springs — daylight is calculated from latitude, everything else is measured, sea temperature from the nearest open water 36 km away
Month	Day	Night	Rain	Wet days	Sea	Daylight	Comfort	Coverage
January	15°C	4.3°C	233 mm	11.8	11.6°C	9 h 43	15	Strong coverage
February	17°C	5°C	207 mm	9.6	11.7°C	10 h 41	29	Strong coverage
March	19.8°C	6.4°C	155 mm	9.8	11.4°C	11 h 50	48	Strong coverage
April	22.7°C	7.8°C	70 mm	6.3	10.8°C	13 h 09	75	Strong coverage
May	26.8°C	10.5°C	41 mm	3.7	10.7°C	14 h 16	81	Strong coverage
June	31.4°C	13.3°C	5 mm	0.8	10.7°C	14 h 52	72	Strong coverage
July	34.1°C	13.7°C	0 mm	0.1	11.3°C	14 h 38	64	Strong coverage
August	33.7°C	14°C	1 mm	0.1	12.1°C	13 h 41	66	Strong coverage
September	31.5°C	12.8°C	4 mm	0.8	12.8°C	12 h 23	71	Strong coverage
October	26.5°C	10.1°C	44 mm	3.1	12.7°C	11 h 07	82	Strong coverage
November	18.8°C	6.4°C	121 mm	7.5	12.4°C	10 h 00	51	Strong coverage
December	14.2°C	3.8°C	236 mm	11.1	11.9°C	9 h 27	12	Strong coverage

What has changed

Alderglen Springs runs +1.5°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

+2.1

Feb

+1.5

Mar

+1.1

Apr

+1.8

May

+1.2

Jun

+1.8

Jul

+1.1

Aug

+1.3

Sep

+1.4

Oct

+1.8

Nov

+1.4

Dec

+1.1

October daytime highs, 2011–2025. Last recorded: 23.7°C.

Records at CLOVERDALE, 1955–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	29.4°C9 Jan 1962	-6.1°C2 Jan 1976	124 mm8 Jan 1995	794 mm1995 · driest 2 mm in 1963	70
February	30.0°C15 Feb 1977	-6.1°C1 Feb 1979	128 mm15 Feb 1986	611 mm1998 · driest 0 mm in 2020	69
March	34.4°C17 Mar 2026	-1.7°C27 Mar 2023	149 mm9 Mar 1995	528 mm1983 · driest 0 mm in 2026	69
April	38.9°C8 Apr 1989	-1.1°C15 Apr 1975	71 mm11 Apr 1982	238 mm2006 · driest 2 mm in 1981	68
May	41.7°C21 May 2001	0.6°C10 May 2022	72 mm18 May 2005	154 mm1998 · driest 0 mm in 2004	68
June	46.7°C14 Jun 2000	2.2°C11 Jun 1972	34 mm2 Jun 1967	58 mm2011 · driest 0 mm in 2002	66
July	46.1°C15 Jul 1972	5.0°C20 Jul 2014	27 mm8 Jul 1974	34 mm1974 · driest 0 mm in 2014	67
August	45.6°C11 Aug 1971	5.6°C2 Aug 1985	25 mm20 Aug 1997	38 mm1983 · driest 0 mm in 1963	65
September	46.7°C7 Sep 2022	3.3°C28 Sep 2019	91 mm27 Sep 1957	109 mm1957 · driest 0 mm in 1960	66
October	41.1°C2 Oct 1980	0.0°C30 Oct 1971	213 mm12 Oct 1962	311 mm1962 · driest 0 mm in 1978	68
November	35.0°C1 Nov 1966	-3.3°C29 Nov 2019	156 mm22 Nov 2024	500 mm1973 · driest 1 mm in 1959	69
December	28.3°C4 Dec 1958	-8.3°C22 Dec 1990	169 mm11 Dec 2014	645 mm1955 · driest 0 mm in 1989	69

Typical days per month at CLOVERDALE, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)
January	<1	0	4	6
February	1	0	2	6
March	6	<1	<1	4
April	9	3	<1	2
May	17	8	0	1
June	24	17	0	<1
July	26	23	0	0
August	26	22	0	0
September	23	16	0	<1
October	17	8	0	2
November	4	<1	1	4
December	<1	0	5	6

The best month has moved. On the 1961–1990 numbers the strongest month here was May (scoring 84); on 2011–2025 it is April (83). Both are scored the same way, from the same station — only the climate underneath changed.

How often, not how much — every day in CLOVERDALE’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	10%	36%	20%	45%	12.4–17.0°C
February	24%	35%	20%	45%	14.2–19.8°C
March	38%	32%	15%	38%	15.8–21.9°C
April	60%	21%	8%	22%	18.8–24.7°C
May	83%	11%	3%	9%	23.6–28.3°C
June	96%	3%	<1%	<1%	27.3–32.8°C
July	99%	<1%	0%	0%	31.3–35.1°C
August	98%	2%	<1%	1%	31.5–34.6°C
September	95%	5%	1%	4%	28.3–32.6°C
October	80%	12%	6%	12%	23.0–28.8°C
November	36%	27%	14%	37%	16.2–21.7°C
December	9%	34%	20%	42%	12.1–17.0°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.

1956Each stripe is one year’s mean temperature against the 57-year average. Warmest: 2014. Coolest: 1975.2025

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 5322997
NOAA station: USC00041838 · CLOVERDALE
Station distance: 5.2 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 25 usable years
Daylight: Calculated from latitude 38.84°, mid-month, sunrise to sunset including refraction. Not a station measurement.
Sea temperature: NOAA OISST v2.1 1991–2020 monthly climatology, nearest open water 36 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 CLOVERDALE is what differs

Cloverdale→Asti→Black Oaks→Chianti→Dawes→Duncan Springs→

Or put two places side by side: Alderglen Springs vs Cloverdale

Best time to visitAlderglen Springs.

October

June

April

The whole year,without the guesswork.

Alderglen Springs runs +1.5°Con the 1961–1990 baseline.

Nearby, measured,and named.

Best time to visit
Alderglen Springs.

The whole year,
without the guesswork.

Alderglen Springs runs +1.5°C
on the 1961–1990 baseline.

Nearby, measured,
and named.