United States · 1991–2020

Best time to visit
Sisquoc.

May leads for comfortable weather in Sisquoc: typically 23.5°C by day, 8.1°C at night, with 12 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortMay

Typical high23.5°C

Typical low8.1°C

Rain in May12 mm

Comfort

May

May · June · July

86climate match

Beach

August

August · July · September

69climate match

Outdoors

April

April · May · November

87climate match

The weakest month is December, scoring 52 against May’s 86 — nights drop to 4°C, and days reach only 18.5°C, 5° 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

5619.4° / 4.7°

Feb

5819.4° / 5.5°

Mar

6520.6° / 6.4°

Apr

8122.5° / 7.3°

May

8623.5° / 8.1°

Jun

8426.1° / 10°

Jul

8327.3° / 11.3°

Aug

8227.7° / 11.5°

Sep

7928° / 10.8°

Oct

8226.6° / 9.7°

Nov

8022.7° / 6.7°

Dec

5218.5° / 4°

Monthly climate evidence for Sisquoc — daylight is calculated from latitude, everything else is measured, sea temperature from the nearest open water 30 km away
Month	Day	Night	Rain	Wet days	Sea	Daylight	Comfort	Coverage
January	19.4°C	4.7°C	90 mm	6	13.5°C	10 h 03	56	Good coverage
February	19.4°C	5.5°C	77 mm	7.3	13.2°C	10 h 52	58	Good coverage
March	20.6°C	6.4°C	72 mm	6.3	12.8°C	11 h 52	65	Good coverage
April	22.5°C	7.3°C	31 mm	3.1	12.1°C	13 h 01	81	Good coverage
May	23.5°C	8.1°C	12 mm	1.6	12.3°C	13 h 58	86	Good coverage
June	26.1°C	10°C	1 mm	0.4	13.1°C	14 h 29	84	Good coverage
July	27.3°C	11.3°C	2 mm	0.2	14.4°C	14 h 17	83	Good coverage
August	27.7°C	11.5°C	0 mm	0.1	15.0°C	13 h 28	82	Good coverage
September	28°C	10.8°C	1 mm	0.2	15.4°C	12 h 21	79	Good coverage
October	26.6°C	9.7°C	22 mm	1.8	15.5°C	11 h 15	82	Good coverage
November	22.7°C	6.7°C	38 mm	3.8	14.9°C	10 h 17	80	Good coverage
December	18.5°C	4°C	87 mm	6.4	13.9°C	9 h 49	52	Good coverage

What has changed

Sisquoc runs +0.7°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

+1.3

Feb

+0.1

Mar

+1.0

Apr

+1.4

May

+0.7

Jun

+0.5

Jul

+0.2

Aug

+0.4

Sep

+0.8

Oct

+1.2

Nov

+0.8

Dec

+0.1

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

Records at TWITCHELL DAM, 1962–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	34.4°C15 Jan 2021	-8.3°C1 Jan 2015	96 mm23 Jan 2008	291 mm1969 · driest 0 mm in 2003	56
February	32.2°C8 Feb 2006	-7.2°C15 Feb 1990	70 mm10 Feb 1978	250 mm1978 · driest 0 mm in 2020	57
March	36.7°C17 Mar 2026	-3.3°C7 Mar 1976	109 mm20 Mar 2011	272 mm1991 · driest 0 mm in 1972	56
April	42.2°C20 Apr 2009	-1.7°C1 Apr 2023	49 mm6 Apr 2020	168 mm1967 · driest 0 mm in 1992	58
May	40.0°C2 May 2004	-1.7°C13 May 2015	33 mm5 May 2005	50 mm2005 · driest 0 mm in 1974	55
June	44.4°C20 Jun 2008	1.7°C22 Jun 2015	15 mm6 Jun 2011	18 mm2011 · driest 0 mm in 2021	57
July	43.9°C6 Jul 1989	2.2°C18 Jul 2015	25 mm20 Jul 2015	28 mm2015 · driest 0 mm in 1971	55
August	42.8°C4 Aug 1969	3.9°C31 Aug 2015	24 mm19 Aug 1976	28 mm1976 · driest 0 mm in 2024	54
September	46.1°C6 Sep 2020	0.6°C27 Sep 2013	49 mm29 Sep 1976	119 mm1976 · driest 0 mm in 1962	54
October	41.7°C1 Oct 2020	-3.3°C30 Oct 1971	69 mm14 Oct 2009	93 mm2004 · driest 0 mm in 2024	55
November	36.7°C7 Nov 2006	-7.2°C30 Nov 2015	57 mm30 Nov 1982	156 mm2025 · driest 0 mm in 1980	53
December	30.6°C10 Dec 2025	-7.8°C27 Dec 2015	123 mm19 Dec 2010	321 mm2010 · driest 1 mm in 2017	56

Typical days per month at TWITCHELL DAM, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)
January	4	<1	4	3
February	4	<1	2	3
March	6	<1	<1	3
April	9	2	<1	1
May	10	4	<1	<1
June	15	6	0	0
July	22	7	0	0
August	23	8	0	0
September	22	9	0	0
October	18	8	<1	<1
November	9	2	2	1
December	2	0	5	3

How often, not how much — every day in TWITCHELL DAM’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	40%	19%	9%	22%	16.6–21.4°C
February	43%	23%	10%	30%	17.1–22.3°C
March	47%	22%	9%	21%	17.0–23.0°C
April	62%	12%	4%	8%	19.1–24.0°C
May	74%	4%	<1%	2%	20.3–25.5°C
June	94%	1%	<1%	<1%	22.6–28.6°C
July	99%	<1%	<1%	0%	25.0–28.8°C
August	99%	<1%	<1%	0%	25.7–29.2°C
September	97%	3%	<1%	1%	25.3–30.1°C
October	90%	6%	2%	4%	24.4–28.6°C
November	67%	14%	5%	13%	19.7–24.4°C
December	39%	19%	8%	21%	16.6–21.7°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.

1963Each stripe is one year’s mean temperature against the 40-year average. Warmest: 2020. Coolest: 2015.2025

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 5396136
NOAA station: USC00049111 · TWITCHELL DAM
Station distance: 14 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 18 usable years
Daylight: Calculated from latitude 34.86°, mid-month, sunrise to sunset including refraction. Not a station measurement.
Sea temperature: NOAA OISST v2.1 1991–2020 monthly climatology, nearest open water 30 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 TWITCHELL DAM is what differs

Nipomo→Garey→Hathaway Place→Huasna→Hubert Place→Reeves Place→

Or put two places side by side: Sisquoc vs Nipomo

Best time to visitSisquoc.

May

August

April

The whole year,without the guesswork.

Sisquoc runs +0.7°Con the 1961–1990 baseline.

Nearby, measured,and named.

Best time to visit
Sisquoc.

The whole year,
without the guesswork.

Sisquoc runs +0.7°C
on the 1961–1990 baseline.

Nearby, measured,
and named.