United States · 1991–2020

Best time to visit
Deer Park.

September leads for comfortable weather in Deer Park: typically 26.4°C by day, 14°C at night, with 99 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortSeptember

Typical high26.4°C

Typical low14°C

Rain in September99 mm

Comfort

September

September · May · June

79climate match

Beach

July

July · August · June

74climate match

Outdoors

October

October · April · May

81climate match

The weakest month is January, scoring 5 against September’s 79 — days reach only 3.8°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

53.8° / -5.9°

Feb

56.9° / -3.7°

Mar

3013.2° / 1.5°

Apr

5119.2° / 7°

May

7724° / 12.6°

Jun

6528.8° / 17.6°

Jul

5531° / 19.7°

Aug

5930.6° / 18.7°

Sep

7926.4° / 14°

Oct

6119.7° / 7.7°

Nov

2912.3° / 1.6°

Dec

56.1° / -3.5°

Monthly climate evidence for Deer Park — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	3.8°C	-5.9°C	53 mm	5.9	9 h 43	5	Strong coverage
February	6.9°C	-3.7°C	54 mm	5.5	10 h 41	5	Strong coverage
March	13.2°C	1.5°C	75 mm	8	11 h 50	30	Strong coverage
April	19.2°C	7°C	126 mm	9.4	13 h 10	51	Strong coverage
May	24°C	12.6°C	121 mm	10.3	14 h 16	77	Strong coverage
June	28.8°C	17.6°C	107 mm	7.6	14 h 52	65	Strong coverage
July	31°C	19.7°C	103 mm	7.4	14 h 38	55	Strong coverage
August	30.6°C	18.7°C	105 mm	6.3	13 h 41	59	Strong coverage
September	26.4°C	14°C	99 mm	6	12 h 24	79	Strong coverage
October	19.7°C	7.7°C	89 mm	7.5	11 h 07	61	Strong coverage
November	12.3°C	1.6°C	69 mm	6.4	10 h	29	Strong coverage
December	6.1°C	-3.5°C	53 mm	5.5	9 h 27	5	Strong coverage

What has changed

Deer Park 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

+1.9

Mar

+2.3

Apr

+1.1

May

+1.2

Jun

+1.4

Jul

0.0

Aug

0.0

Sep

+1.6

Oct

+1.2

Nov

+1.3

Dec

+3.4

September daytime highs, 2011–2025. Last recorded: 28.9°C.

Records at COLUMBIA RGNL AP, 1969–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	25.0°C28 Jan 2013	-28.3°C10 Jan 1982	62 mm10 Jan 2020	151 mm2005 · driest 1 mm in 1986	57
February	27.8°C29 Feb 1972	-26.1°C5 Feb 1979	61 mm21 Feb 1985	157 mm1985 · driest 3 mm in 2006	57
March	33.9°C26 Mar 2026	-20.6°C4 Mar 1978	100 mm26 Mar 2004	256 mm1973 · driest 20 mm in 1971	57
April	32.2°C12 Apr 1972	-7.2°C7 Apr 2007	114 mm28 Apr 1996	297 mm1994 · driest 11 mm in 2018	57
May	34.4°C27 May 2018	-1.7°C3 May 1976	121 mm17 May 1995	313 mm1995 · driest 33 mm in 2012	57
June	41.7°C28 Jun 2012	4.4°C5 Jun 1993	134 mm25 Jun 2021	280 mm2021 · driest 9 mm in 1980	57
July	43.9°C30 Jul 1980	8.9°C13 Jul 1975	151 mm30 Jul 1989	308 mm1981 · driest 6 mm in 1976	57
August	43.3°C29 Aug 1984	5.6°C28 Aug 1986	109 mm12 Aug 1993	259 mm2005 · driest 3 mm in 2025	56
September	38.3°C14 Sep 1971	0.0°C30 Sep 1984	114 mm1 Sep 2014	306 mm1993 · driest 12 mm in 1979	56
October	34.4°C2 Oct 2006	-5.6°C19 Oct 1972	124 mm8 Oct 2009	279 mm2009 · driest 9 mm in 2010	56
November	28.3°C1 Nov 2016	-17.8°C8 Nov 1991	107 mm17 Nov 2015	265 mm1985 · driest 9 mm in 2017	57
December	24.4°C15 Dec 2021	-28.9°C22 Dec 1989	69 mm2 Dec 1982	179 mm2015 · driest 6 mm in 2017	57

Typical days per month at COLUMBIA RGNL AP, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)	Snow days
January	0	0	26	2	4
February	<1	0	21	2	3
March	2	0	13	3	1
April	7	<1	3	4	<1
May	15	4	0	4	0
June	26	13	0	3	0
July	30	20	0	3	0
August	29	19	0	3	0
September	20	8	0	3	0
October	7	1	2	3	<1
November	<1	0	12	2	<1
December	0	0	23	2	2

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

How often, not how much — every day in COLUMBIA RGNL AP’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	<1%	18%	5%	13%	-0.3–7.2°C
February	5%	20%	6%	18%	1.7–10.9°C
March	16%	27%	9%	31%	9.1–16.3°C
April	35%	31%	12%	38%	16.7–21.5°C
May	56%	32%	13%	40%	21.5–26.2°C
June	74%	25%	11%	28%	26.9–30.7°C
July	76%	24%	10%	22%	29.4–33.2°C
August	79%	21%	9%	20%	28.3–32.9°C
September	73%	21%	9%	20%	24.2–28.6°C
October	42%	24%	9%	25%	17.5–21.8°C
November	12%	22%	8%	22%	8.7–15.1°C
December	2%	19%	6%	17%	2.6–8.7°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.

1970Each stripe is one year’s mean temperature against the 56-year average. Warmest: 2012. Coolest: 1979.2025

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 4383641
NOAA station: USW00003945 · COLUMBIA RGNL AP
Station distance: 5.8 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 30 usable years
Daylight: Calculated from latitude 38.86°, 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 COLUMBIA RGNL AP is what differs

Ashland→Hartsburg→Boydsville→Burlington (historical)→Easley→Elkhurst→

Or put two places side by side: Deer Park vs Ashland

Best time to visitDeer Park.