United States · 1991–2020

Best time to visit
Bayha (historical).

October leads for comfortable weather in Bayha (historical): typically 24.8°C by day, 12.7°C at night, with 90 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortOctober

Typical high24.8°C

Typical low12.7°C

Rain in October90 mm

Comfort

October

October · May · June

85climate match

Beach

June

June · September · July

84climate match

Outdoors

April

April · October · May

76climate match

The weakest month is January, scoring 5 against October’s 85 — days reach only 12.3°C, 12° below the 24°C the score treats as ideal, and 270 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

512.3° / 4.7°

Feb

914.3° / 5.4°

Mar

2517° / 6.6°

Apr

6020.4° / 8.7°

May

8125.5° / 13°

Jun

7330.7° / 17.2°

Jul

5235.6° / 20.6°

Aug

5535.1° / 19.8°

Sep

7031.9° / 17.2°

Oct

8524.8° / 12.7°

Nov

3916.4° / 7.8°

Dec

511.8° / 4.8°

Monthly climate evidence for Bayha (historical) — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	12.3°C	4.7°C	270 mm	11.8	9 h 33	5	Strong coverage
February	14.3°C	5.4°C	288 mm	10.7	10 h 35	9	Strong coverage
March	17°C	6.6°C	245 mm	10.8	11 h 49	25	Strong coverage
April	20.4°C	8.7°C	124 mm	7.6	13 h 14	60	Strong coverage
May	25.5°C	13°C	87 mm	5.9	14 h 25	81	Strong coverage
June	30.7°C	17.2°C	38 mm	2.5	15 h 04	73	Strong coverage
July	35.6°C	20.6°C	3 mm	0.4	14 h 49	52	Strong coverage
August	35.1°C	19.8°C	4 mm	0.3	13 h 47	55	Strong coverage
September	31.9°C	17.2°C	14 mm	1.3	12 h 25	70	Strong coverage
October	24.8°C	12.7°C	90 mm	3.8	11 h 03	85	Strong coverage
November	16.4°C	7.8°C	167 mm	8.1	9 h 51	39	Strong coverage
December	11.8°C	4.8°C	305 mm	11.1	9 h 16	5	Strong coverage

What has changed

Bayha (historical) runs +1.7°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

+1.7

Feb

+2.0

Mar

+0.9

Apr

+1.9

May

+1.6

Jun

+2.2

Jul

+2.0

Aug

+2.1

Sep

+2.2

Oct

+1.5

Nov

+1.5

Dec

+1.1

October daytime highs, 2011–2025. Last recorded: 22.8°C.

Records at SHASTA DAM, 1943–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	26.7°C30 Jan 2015	-7.2°C22 Jan 1962	197 mm16 Jan 1973	971 mm1995 · driest 12 mm in 2014	83
February	26.7°C27 Feb 1986	-6.1°C5 Feb 1989	183 mm27 Feb 2019	933 mm1998 · driest 0 mm in 2022	83
March	35.0°C21 Mar 2026	-3.9°C24 Mar 2011	177 mm24 Mar 1998	877 mm1983 · driest 1 mm in 2026	84
April	36.1°C14 Apr 1947	-2.2°C13 Apr 2012	126 mm26 Apr 1959	361 mm1948 · driest 1 mm in 1973	83
May	41.7°C19 May 1973	1.7°C3 May 1950	101 mm17 May 1996	324 mm1990 · driest 0 mm in 2021	82
June	43.9°C29 Jun 1956	3.3°C4 Jun 1982	134 mm30 Jun 1992	172 mm1992 · driest 0 mm in 2024	84
July	46.1°C28 Jul 1976	10.0°C1 Jul 1997	67 mm9 Jul 1974	102 mm1974 · driest 0 mm in 1944	84
August	46.1°C8 Aug 1981	6.7°C22 Aug 1978	86 mm15 Aug 1976	139 mm1976 · driest 0 mm in 2020	81
September	45.6°C3 Sep 1955	6.1°C30 Sep 1971	113 mm27 Sep 1957	226 mm1977 · driest 0 mm in 1995	83
October	40.0°C2 Oct 2012	1.1°C30 Oct 1971	110 mm31 Oct 1944	540 mm2000 · driest 0 mm in 1966	81
November	32.2°C4 Nov 1949	-2.8°C28 Nov 2025	166 mm28 Nov 1970	702 mm1973 · driest 1 mm in 1959	82
December	26.7°C2 Dec 2021	-10.0°C21 Dec 1990	296 mm22 Dec 1964	961 mm2002 · driest 0 mm in 1989	83

Typical days per month at SHASTA DAM, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)
January	<1	0	2	7
February	<1	0	1	7
March	3	0	<1	6
April	8	2	<1	4
May	18	8	0	3
June	26	18	0	1
July	30	29	0	<1
August	30	28	0	<1
September	27	21	0	<1
October	17	6	0	2
November	2	0	<1	4
December	0	0	2	7

The best month has moved. On the 1961–1990 numbers the strongest month here was May (scoring 89); on 2011–2025 it is October (87). Both are scored the same way, from the same station — only the climate underneath changed.

How often, not how much — every day in SHASTA 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	5%	36%	22%	47%	9.4–14.0°C
February	13%	36%	22%	47%	11.2–17.0°C
March	28%	34%	19%	44%	13.4–19.8°C
April	53%	23%	11%	27%	17.2–23.8°C
May	77%	16%	7%	18%	22.5–28.5°C
June	91%	8%	3%	6%	27.5–33.4°C
July	98%	2%	<1%	<1%	33.0–37.3°C
August	97%	3%	1%	1%	33.0–36.9°C
September	93%	6%	2%	4%	28.4–33.5°C
October	74%	14%	7%	16%	21.2–27.8°C
November	23%	29%	17%	40%	13.7–19.2°C
December	3%	35%	21%	44%	9.8–14.6°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.

1944Each stripe is one year’s mean temperature against the 74-year average. Warmest: 2015. Coolest: 1982.2024

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 5559330
NOAA station: USC00048135 · SHASTA DAM
Station distance: 8.1 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 28 usable years
Daylight: Calculated from latitude 40.73°, 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 SHASTA DAM is what differs

Shasta Lake→Central Valley (historical)→Mountain Gate→Lakehead→Antlers→Baird (historical)→

Or put two places side by side: Bayha (historical) vs Shasta Lake

Best time to visitBayha (historical).