United States · 1991–2020

Best time to visit
Caldwell.

June leads for comfortable weather in Caldwell: typically 26.8°C by day, 11.6°C at night, with 19 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortJune

Typical high26.8°C

Typical low11.6°C

Rain in June19 mm

Comfort

June

June · September · May

84climate match

Beach

July

July · August · June

76climate match

Outdoors

October

October · May · April

87climate match

The weakest month is January, scoring 5 against June’s 84 — days reach only 4.4°C, 20° 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

54.4° / -3.7°

Feb

178.6° / -2°

Mar

4114.4° / 1.5°

Apr

5717.7° / 4°

May

8122.7° / 8.3°

Jun

8426.8° / 11.6°

Jul

7232.1° / 15.6°

Aug

7431.7° / 14.5°

Sep

8226.8° / 10°

Oct

6519.2° / 4.6°

Nov

249.9° / -0.5°

Dec

54.6° / -3.5°

Monthly climate evidence for Caldwell — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	4.4°C	-3.7°C	31 mm	6.6	9 h 16	5	Good coverage
February	8.6°C	-2°C	19 mm	4.3	10 h 25	17	Good coverage
March	14.4°C	1.5°C	24 mm	5.9	11 h 47	41	Good coverage
April	17.7°C	4°C	27 mm	6.1	13 h 22	57	Good coverage
May	22.7°C	8.3°C	28 mm	5.6	14 h 41	81	Good coverage
June	26.8°C	11.6°C	19 mm	3.8	15 h 25	84	Good coverage
July	32.1°C	15.6°C	6 mm	1.5	15 h 08	72	Good coverage
August	31.7°C	14.5°C	5 mm	1.1	13 h 59	74	Good coverage
September	26.8°C	10°C	9 mm	1.9	12 h 27	82	Good coverage
October	19.2°C	4.6°C	18 mm	3.7	10 h 56	65	Good coverage
November	9.9°C	-0.5°C	22 mm	4.9	9 h 36	24	Good coverage
December	4.6°C	-3.5°C	32 mm	6.4	8 h 57	5	Good coverage

Records at DEER FLAT DAM, 1916–2014
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	19.4°C9 Jan 1953	-32.8°C27 Jan 1957	21 mm20 Jan 1969	87 mm1970 · driest 1 mm in 1949	66
February	20.0°C25 Feb 1986	-28.9°C5 Feb 1989	32 mm23 Feb 2000	72 mm1986 · driest 0 mm in 2005	65
March	26.1°C29 Mar 1978	-14.4°C7 Mar 1985	24 mm20 Mar 1981	89 mm1993 · driest 0 mm in 1955	66
April	31.1°C6 Apr 1985	-6.1°C10 Apr 1954	29 mm14 Apr 1973	85 mm1978 · driest 0 mm in 1949	66
May	36.1°C31 May 1986	-7.2°C21 May 1918	36 mm12 May 1958	101 mm1998 · driest 1 mm in 1924	74
June	37.2°C17 Jun 1961	-0.6°C4 Jun 1917	28 mm6 Jun 1967	61 mm1993 · driest 0 mm in 1919	73
July	41.7°C22 Jul 2006	-0.6°C15 Jul 1983	21 mm31 Jul 1960	29 mm1983 · driest 0 mm in 2013	74
August	39.4°C4 Aug 1961	1.7°C24 Aug 1925	37 mm13 Aug 1979	60 mm1965 · driest 0 mm in 1955	76
September	37.2°C6 Sep 1973	-5.6°C18 Sep 1925	35 mm14 Sep 1959	80 mm1959 · driest 0 mm in 1987	74
October	36.7°C1 Oct 1920	-8.3°C31 Oct 2006	31 mm29 Oct 1982	56 mm1956 · driest 0 mm in 1917	73
November	26.7°C7 Nov 2006	-20.6°C26 Nov 1985	27 mm13 Nov 1958	56 mm1988 · driest 0 mm in 1917	70
December	23.3°C12 Dec 1995	-30.0°C22 Dec 1990	24 mm23 Dec 1955	74 mm2010 · driest 0 mm in 1989	65

Typical days per month at DEER FLAT DAM, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)
January	0	0	21	<1
February	0	0	18	<1
March	<1	0	10	<1
April	2	<1	5	<1
May	10	2	<1	<1
June	18	7	0	<1
July	27	22	0	<1
August	26	20	0	0
September	19	6	<1	<1
October	3	<1	4	<1
November	0	0	14	<1
December	0	0	21	<1

How often, not how much — every day in DEER FLAT 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	0%	21%	2%	24%	-1.0–6.8°C
February	<1%	17%	1%	15%	3.7–10.6°C
March	8%	19%	1%	18%	10.6–15.9°C
April	32%	18%	2%	16%	15.2–20.6°C
May	63%	16%	2%	15%	20.1–25.2°C
June	83%	13%	1%	10%	24.9–28.7°C
July	96%	4%	<1%	1%	29.5–33.4°C
August	95%	5%	<1%	2%	28.3–32.9°C
September	85%	7%	1%	5%	23.4–28.2°C
October	39%	12%	1%	7%	16.2–21.1°C
November	<1%	19%	1%	20%	7.5–12.1°C
December	0%	22%	2%	19%	0.7–6.8°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 57-year average. Warmest: 1992. Coolest: 1984.2013

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 5587698
NOAA station: USC00102444 · DEER FLAT DAM
Station distance: 10.8 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 20 usable years
Daylight: Calculated from latitude 43.66°, 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 DEER FLAT DAM is what differs

Marsing→Claytonia→Doles→Enrose→Givens Hot Springs→Huston→

Or put two places side by side: Caldwell vs Marsing

Best time to visitCaldwell.