United States · 1991–2020

Best time to visit
Black Jack Valley (historical).

October leads for comfortable weather in Black Jack Valley (historical): typically 23.5°C by day, 8.6°C at night, with 82 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortOctober

Typical high23.5°C

Typical low8.6°C

Rain in October82 mm

Comfort

October

October · May · September

78climate match

Beach

July

July · September · August

74climate match

Outdoors

October

October · April · November

77climate match

The weakest month is January, scoring 17 against October’s 78 — days reach only 12°C, 12° below the 24°C the score treats as ideal, and nights drop to -1.8°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

1712° / -1.8°

Feb

3014.3° / -0.5°

Mar

4418.3° / 2.5°

Apr

7323.4° / 7.4°

May

7527.1° / 12.6°

Jun

5930.8° / 17.8°

Jul

5332.6° / 19.9°

Aug

5531.7° / 19.3°

Sep

7428.6° / 15.8°

Oct

7823.5° / 8.6°

Nov

4717.7° / 2.5°

Dec

2313.4° / -0.5°

Monthly climate evidence for Black Jack Valley (historical) — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	12°C	-1.8°C	99 mm	7.9	10 h 04	17	Strong coverage
February	14.3°C	-0.5°C	82 mm	7.1	10 h 53	30	Strong coverage
March	18.3°C	2.5°C	109 mm	7.7	11 h 52	44	Strong coverage
April	23.4°C	7.4°C	89 mm	7	13 h 00	73	Strong coverage
May	27.1°C	12.6°C	88 mm	6.6	13 h 57	75	Strong coverage
June	30.8°C	17.8°C	101 mm	7.5	14 h 28	59	Strong coverage
July	32.6°C	19.9°C	81 mm	7.1	14 h 16	53	Strong coverage
August	31.7°C	19.3°C	95 mm	7	13 h 27	55	Strong coverage
September	28.6°C	15.8°C	84 mm	5.8	12 h 21	74	Strong coverage
October	23.5°C	8.6°C	82 mm	5	11 h 15	78	Strong coverage
November	17.7°C	2.5°C	83 mm	5.9	10 h 18	47	Strong coverage
December	13.4°C	-0.5°C	101 mm	8	9 h 50	23	Strong coverage

What has changed

Black Jack Valley (historical) runs +0.3°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

+0.9

Feb

+1.7

Mar

+0.3

Apr

0.0

May

-0.5

Jun

+0.1

Jul

+0.1

Aug

-0.7

Sep

+0.2

Oct

+0.4

Nov

-0.6

Dec

+1.1

October daytime highs, 2011–2025. Last recorded: 21.8°C.

Records at UNION 8 S, 1949–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	27.8°C30 Jan 2002	-18.3°C21 Jan 1985	102 mm15 Jan 1995	221 mm1995 · driest 9 mm in 1981	77
February	28.3°C29 Feb 1972	-16.1°C1 Feb 1966	62 mm11 Feb 1981	204 mm1961 · driest 1 mm in 2008	77
March	32.2°C24 Mar 1995	-12.8°C6 Mar 1960	80 mm3 Mar 1971	294 mm1980 · driest 25 mm in 1985	76
April	35.0°C24 Apr 1980	-6.7°C8 Apr 2007	85 mm21 Apr 1992	244 mm1998 · driest 0 mm in 2012	77
May	36.7°C28 May 1962	-1.7°C9 May 1989	125 mm29 May 2010	270 mm1976 · driest 6 mm in 2000	75
June	41.1°C28 Jun 1954	4.4°C1 Jun 1972	96 mm22 Jun 1995	247 mm1995 · driest 6 mm in 2024	76
July	42.2°C29 Jul 1952	10.0°C7 Jul 1951	141 mm24 Jul 1997	287 mm2013 · driest 6 mm in 1993	74
August	41.7°C18 Aug 1954	7.8°C7 Aug 1957	168 mm12 Aug 1991	310 mm1986 · driest 9 mm in 2007	75
September	38.9°C7 Sep 1954	1.7°C30 Sep 1967	163 mm27 Sep 2024	236 mm2004 · driest 0 mm in 2005	77
October	37.8°C6 Oct 1954	-7.8°C30 Oct 1965	186 mm12 Oct 1990	361 mm1990 · driest 0 mm in 2000	77
November	30.6°C3 Nov 1961	-12.2°C20 Nov 1951	128 mm21 Nov 1985	367 mm1985 · driest 3 mm in 2007	77
December	26.7°C12 Dec 2007	-17.8°C13 Dec 1962	109 mm23 Dec 2013	274 mm2015 · driest 8 mm in 1955	75

Typical days per month at UNION 8 S, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)
January	<1	0	19	3
February	<1	0	16	3
March	4	<1	11	3
April	13	3	3	3
May	22	8	0	3
June	27	18	0	3
July	29	25	0	2
August	28	22	0	3
September	24	12	0	2
October	12	1	2	2
November	2	0	12	3
December	<1	0	19	3

The best month has moved. On the 1961–1990 numbers the strongest month here was April (scoring 76); on 2011–2025 it is October (84). Both are scored the same way, from the same station — only the climate underneath changed.

How often, not how much — every day in UNION 8 S’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	8%	27%	12%	31%	9.1–14.5°C
February	14%	28%	12%	32%	11.2–16.5°C
March	33%	27%	12%	30%	15.7–21.2°C
April	63%	23%	10%	22%	21.5–25.6°C
May	74%	24%	10%	24%	25.2–29.1°C
June	75%	25%	11%	27%	28.8–33.0°C
July	73%	27%	10%	31%	30.7–34.8°C
August	77%	23%	9%	23%	29.9–33.9°C
September	79%	20%	8%	19%	26.9–30.9°C
October	69%	17%	8%	14%	21.5–25.7°C
November	33%	21%	9%	19%	15.5–20.4°C
December	9%	26%	10%	30%	10.5–16.1°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.

1950Each stripe is one year’s mean temperature against the 71-year average. Warmest: 2007. Coolest: 1969.2025

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 4571518
NOAA station: USC00388786 · UNION 8 S
Station distance: 15.3 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 28 usable years
Daylight: Calculated from latitude 34.69°, 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 UNION 8 S is what differs

Union→Whitmire→Buffalo→Cross Anchor→Bishop Town (historical)→Bonham→

Or put two places side by side: Black Jack Valley (historical) vs Union

Best time to visitBlack Jack Valley (historical).

October

July

October

The whole year,without the guesswork.

Black Jack Valley (historical) runs +0.3°Con the 1961–1990 baseline.

Nearby, measured,and named.

Best time to visit
Black Jack Valley (historical).

The whole year,
without the guesswork.

Black Jack Valley (historical) runs +0.3°C
on the 1961–1990 baseline.

Nearby, measured,
and named.