United States · 1991–2020

Best time to visit
Blue Branch.

September leads for comfortable weather in Blue Branch: typically 27.2°C by day, 14.7°C at night, with 109 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortSeptember

Typical high27.2°C

Typical low14.7°C

Rain in September109 mm

Comfort

September

September · May · October

75climate match

Beach

August

August · July · June

73climate match

Outdoors

October

October · April · November

79climate match

The weakest month is January, scoring 5 against September’s 75 — days reach only 5.3°C, 19° below the 24°C the score treats as ideal, and nights drop to -6.1°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

55.3° / -6.1°

Feb

108.1° / -4°

Mar

3013.4° / 0.8°

Apr

5119.5° / 6.5°

May

7324.2° / 12.7°

Jun

6029.1° / 18.1°

Jul

4931.7° / 20.6°

Aug

5631.3° / 19.4°

Sep

7527.2° / 14.7°

Oct

6520.9° / 7.9°

Nov

3413.8° / 1.9°

Dec

107.8° / -3.2°

Monthly climate evidence for Blue Branch — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	5.3°C	-6.1°C	45 mm	5.1	9 h 46	5	Strong coverage
February	8.1°C	-4°C	46 mm	4.9	10 h 43	10	Strong coverage
March	13.4°C	0.8°C	73 mm	8.2	11 h 50	30	Strong coverage
April	19.5°C	6.5°C	126 mm	9.3	13 h 08	51	Strong coverage
May	24.2°C	12.7°C	143 mm	10.8	14 h 13	73	Strong coverage
June	29.1°C	18.1°C	128 mm	8.3	14 h 48	60	Strong coverage
July	31.7°C	20.6°C	119 mm	7.1	14 h 35	49	Strong coverage
August	31.3°C	19.4°C	98 mm	7.1	13 h 39	56	Strong coverage
September	27.2°C	14.7°C	109 mm	6.9	12 h 23	75	Strong coverage
October	20.9°C	7.9°C	91 mm	7.6	11 h 08	65	Strong coverage
November	13.8°C	1.9°C	78 mm	6.2	10 h 03	34	Strong coverage
December	7.8°C	-3.2°C	48 mm	4.8	9 h 31	10	Strong coverage

Records at TRUMAN DAM & RSVR, 1980–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	22.8°C29 Jan 2013	-24.4°C19 Jan 1984	77 mm5 Jan 2005	135 mm2005 · driest 2 mm in 2009	46
February	27.2°C27 Feb 1996	-27.2°C10 Feb 2011	103 mm21 Feb 1997	149 mm1997 · driest 0 mm in 2006	46
March	33.9°C22 Mar 2026	-16.7°C4 Mar 2014	56 mm8 Mar 1998	170 mm1998 · driest 20 mm in 1995	43
April	33.3°C14 Apr 2006	-6.1°C4 Apr 1987	150 mm11 Apr 1994	441 mm1994 · driest 22 mm in 1989	45
May	35.0°C5 May 2014	0.0°C7 May 1989	117 mm18 May 1995	391 mm1995 · driest 25 mm in 2012	46
June	40.0°C25 Jun 1988	6.7°C10 Jun 1988	94 mm25 Jun 1993	292 mm1981 · driest 15 mm in 1988	41
July	42.2°C31 Jul 1986	11.7°C5 Jul 1997	161 mm18 Jul 2018	319 mm1993 · driest 17 mm in 1983	46
August	42.2°C3 Aug 2011	6.7°C29 Aug 1986	125 mm6 Aug 2017	246 mm2019 · driest 19 mm in 1991	45
September	40.6°C3 Sep 2000	-1.7°C24 Sep 1989	110 mm14 Sep 2008	283 mm1993 · driest 19 mm in 2022	43
October	34.4°C4 Oct 2006	-5.6°C24 Oct 1981	158 mm3 Oct 1986	327 mm1986 · driest 13 mm in 2010	44
November	28.9°C1 Nov 2016	-15.0°C8 Nov 1991	96 mm20 Nov 1994	276 mm1992 · driest 0 mm in 1989	45
December	25.6°C26 Dec 2025	-28.9°C23 Dec 1989	49 mm1 Dec 1997	117 mm1982 · driest 2 mm in 2025	45

Typical days per month at TRUMAN DAM & RSVR, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)
January	0	0	22	1
February	<1	0	19	1
March	2	0	14	2
April	7	<1	3	4
May	15	4	0	4
June	25	14	0	4
July	29	21	0	3
August	28	19	0	3
September	20	10	0	3
October	9	2	2	3
November	1	0	10	2
December	0	0	19	2

How often, not how much — every day in TRUMAN DAM & RSVR’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%	16%	4%	12%	2.2–8.5°C
February	8%	19%	5%	15%	3.8–11.9°C
March	20%	27%	9%	32%	10.1–17.0°C
April	37%	31%	12%	38%	16.9–21.8°C
May	54%	35%	15%	48%	22.1–26.4°C
June	71%	29%	13%	37%	27.1–31.0°C
July	77%	24%	10%	25%	30.1–33.9°C
August	77%	23%	10%	23%	29.1–33.7°C
September	74%	22%	10%	24%	25.0–29.8°C
October	47%	25%	8%	29%	18.0–22.7°C
November	17%	21%	9%	16%	10.0–17.5°C
December	3%	16%	6%	11%	5.0–10.4°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.

1982Each stripe is one year’s mean temperature against the 32-year average. Warmest: 2016. Coolest: 1989.2025

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 4377557
NOAA station: USC00238466 · TRUMAN DAM & RSVR
Station distance: 5.4 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 26 usable years
Daylight: Calculated from latitude 38.23°, 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 TRUMAN DAM & RSVR is what differs

Warsaw→Tightwad→Bentonville→Baker (historical)→Cold Springs→Dell→

Or put two places side by side: Blue Branch vs Warsaw

Best time to visitBlue Branch.