United States · 1991–2020

Best time to visit
Walnut.

September leads for comfortable weather in Walnut: typically 28.4°C by day, 15.4°C at night, with 93 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortSeptember

Typical high28.4°C

Typical low15.4°C

Rain in September93 mm

Comfort

September

September · October · May

75climate match

Beach

August

August · June · July

74climate match

Outdoors

October

October · April · March

77climate match

The weakest month is January, scoring 5 against September’s 75 — days reach only 9.3°C, 15° below the 24°C the score treats as ideal, and nights drop to -1.7°C.

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

59.3° / -1.7°

Feb

1612° / -0.3°

Mar

3816.6° / 3.7°

Apr

6322° / 8.4°

May

7126.3° / 13.7°

Jun

6029.9° / 18.1°

Jul

4832° / 20.4°

Aug

5531.9° / 19.5°

Sep

7528.4° / 15.4°

Oct

7322.5° / 8.7°

Nov

3616° / 3.3°

Dec

510.8° / -0.3°

Monthly climate evidence for Walnut — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	9.3°C	-1.7°C	125 mm	8.7	10 h 03	5	Good coverage
February	12°C	-0.3°C	126 mm	7.6	10 h 52	16	Good coverage
March	16.6°C	3.7°C	124 mm	8.1	11 h 52	38	Good coverage
April	22°C	8.4°C	136 mm	8.2	13 h 01	63	Good coverage
May	26.3°C	13.7°C	130 mm	9.1	13 h 58	71	Good coverage
June	29.9°C	18.1°C	115 mm	7.5	14 h 29	60	Good coverage
July	32°C	20.4°C	114 mm	8.3	14 h 17	48	Good coverage
August	31.9°C	19.5°C	84 mm	7	13 h 28	55	Good coverage
September	28.4°C	15.4°C	93 mm	5.5	12 h 21	75	Good coverage
October	22.5°C	8.7°C	96 mm	5.6	11 h 15	73	Good coverage
November	16°C	3.3°C	120 mm	8.1	10 h 17	36	Good coverage
December	10.8°C	-0.3°C	167 mm	9.3	9 h 49	5	Good coverage

Records at RIPLEY, 1897–2009
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	26.1°C1 Jan 1952	-25.0°C30 Jan 1966	135 mm11 Jan 1974	353 mm1974 · driest 13 mm in 2009	69
February	27.8°C24 Feb 1996	-25.6°C12 Feb 1899	131 mm10 Feb 1966	254 mm2001 · driest 9 mm in 1902	69
March	31.1°C25 Mar 1907	-13.3°C5 Mar 1960	217 mm28 Mar 1902	445 mm1973 · driest 20 mm in 2007	68
April	33.3°C22 Apr 1987	-5.0°C3 Apr 1985	147 mm30 Apr 1907	321 mm1970 · driest 38 mm in 2002	68
May	35.6°C5 May 1902	0.0°C2 May 1909	113 mm7 May 1978	284 mm1978 · driest 5 mm in 2005	65
June	40.0°C27 Jun 1954	5.6°C1 Jun 1984	102 mm1 Jun 1974	432 mm1905 · driest 0 mm in 2009	66
July	42.2°C15 Jul 1980	10.6°C15 Jul 1967	159 mm22 Jul 1953	287 mm1953 · driest 21 mm in 1901	65
August	42.2°C16 Aug 2007	8.9°C30 Aug 1986	107 mm30 Aug 2005	217 mm1901 · driest 4 mm in 1999	66
September	40.6°C5 Sep 1954	1.1°C30 Sep 1967	155 mm27 Sep 2002	312 mm1906 · driest 2 mm in 1956	67
October	35.0°C1 Oct 1953	-8.3°C29 Oct 1952	109 mm25 Oct 1976	238 mm1900 · driest 0 mm in 1908	67
November	29.4°C14 Nov 1955	-12.2°C25 Nov 1970	168 mm27 Nov 1973	330 mm1973 · driest 19 mm in 1956	66
December	25.0°C3 Dec 1982	-21.1°C23 Dec 1989	220 mm1 Dec 1991	418 mm1991 · driest 16 mm in 1980	67

Typical days per month at RIPLEY, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)	Snow days
January	0	0	20	4	<1
February	<1	0	17	4	<1
March	3	0	9	4	<1
April	11	1	2	4	0
May	21	6	0	4	0
June	28	18	0	4	0
July	31	26	0	4	0
August	30	24	0	3	0
September	25	12	0	3	0
October	12	1	2	3	0
November	2	0	11	4	<1
December	<1	0	18	5	<1

How often, not how much — every day in RIPLEY’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	4%	29%	15%	35%	6.7–12.3°C
February	9%	30%	15%	32%	7.9–15.3°C
March	27%	29%	15%	33%	14.0–19.8°C
April	52%	27%	14%	29%	19.6–25.1°C
May	70%	27%	14%	30%	24.8–28.7°C
June	76%	25%	12%	27%	28.2–32.2°C
July	74%	26%	12%	29%	30.6–34.4°C
August	80%	20%	8%	19%	30.6–34.2°C
September	79%	19%	10%	17%	26.5–31.4°C
October	63%	17%	9%	16%	21.2–25.5°C
November	25%	25%	13%	27%	14.2–19.1°C
December	5%	27%	14%	31%	8.8–13.4°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.

1900Each stripe is one year’s mean temperature against the 56-year average. Warmest: 1956. Coolest: 1989.2007

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 4450150
NOAA station: USC00227467 · RIPLEY
Station distance: 23.4 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 17 usable years
Daylight: Calculated from latitude 34.95°, 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 RIPLEY is what differs

Ripley→Blue Mountain→Ashland→Falkner→Dumas→Black Jack→

Or put two places side by side: Walnut vs Ripley

Best time to visitWalnut.