United States · 1991–2020

Best time to visit
Union.

October leads for comfortable weather in Union: typically 22.4°C by day, 8.8°C at night, with 92 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortOctober

Typical high22.4°C

Typical low8.8°C

Rain in October92 mm

Comfort

October

October · May · September

72climate match

Beach

August

August · June · July

71climate match

Outdoors

October

October · April · May

76climate match

The weakest month is January, scoring 5 against October’s 72 — days reach only 10.1°C, 14° below the 24°C the score treats as ideal, and nights drop to -1.2°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

510.1° / -1.2°

Feb

1512.6° / 0.3°

Mar

3517.2° / 3.5°

Apr

6322.3° / 7.5°

May

7126.1° / 12.4°

Jun

6129.6° / 17.1°

Jul

5131.2° / 19°

Aug

5731.2° / 18.7°

Sep

7028.2° / 15.5°

Oct

7222.4° / 8.8°

Nov

3516.2° / 3.1°

Dec

1011.2° / 0.2°

Monthly climate evidence for Union — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	10.1°C	-1.2°C	142 mm	9.8	10 h 03	5	Strong coverage
February	12.6°C	0.3°C	135 mm	10.2	10 h 52	15	Strong coverage
March	17.2°C	3.5°C	144 mm	9.6	11 h 52	35	Strong coverage
April	22.3°C	7.5°C	127 mm	8.8	13 h 01	63	Strong coverage
May	26.1°C	12.4°C	114 mm	9.6	13 h 58	71	Strong coverage
June	29.6°C	17.1°C	109 mm	10.5	14 h 29	61	Strong coverage
July	31.2°C	19°C	113 mm	10.9	14 h 17	51	Strong coverage
August	31.2°C	18.7°C	93 mm	8.3	13 h 28	57	Strong coverage
September	28.2°C	15.5°C	118 mm	7	12 h 21	70	Strong coverage
October	22.4°C	8.8°C	92 mm	6.9	11 h 15	72	Strong coverage
November	16.2°C	3.1°C	128 mm	8.2	10 h 17	35	Strong coverage
December	11.2°C	0.2°C	145 mm	9.5	9 h 50	10	Strong coverage

What has changed

Union runs +0.9°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

+2.0

Feb

+2.3

Mar

+1.3

Apr

+0.5

May

+0.7

Jun

+0.3

Jul

-0.1

Aug

+0.1

Sep

+0.7

Oct

+0.5

Nov

+0.4

Dec

+2.0

October daytime highs, 2011–2023. Last recorded: 26.4°C.

Records at CHICKAMAUGA 2 SW, 1892–2024
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	25.6°C1 Jan 1952	-25.0°C20 Jan 1985	102 mm27 Jan 1996	288 mm1946 · driest 19 mm in 2018	87
February	27.8°C22 Feb 2023	-21.1°C1 Feb 1966	178 mm16 Feb 1990	332 mm1990 · driest 6 mm in 1953	88
March	31.1°C25 Mar 1935	-13.3°C5 Mar 1960	137 mm11 Mar 1952	388 mm1973 · driest 11 mm in 1988	90
April	33.9°C30 Apr 1942	-5.6°C9 Apr 2007	121 mm2 Apr 1936	279 mm1911 · driest 20 mm in 1955	91
May	36.7°C22 May 1941	-1.1°C4 May 1971	117 mm6 May 1999	346 mm2003 · driest 0 mm in 1936	89
June	39.4°C18 Jun 1944	2.8°C1 Jun 1966	112 mm3 Jun 1909	333 mm1909 · driest 11 mm in 1893	87
July	41.1°C18 Jul 1980	5.0°C1 Jul 2000	119 mm2 Jul 2003	276 mm1941 · driest 3 mm in 1955	87
August	40.6°C16 Aug 1954	6.7°C29 Aug 2000	89 mm16 Aug 2021	250 mm1952 · driest 5 mm in 1954	86
September	40.0°C5 Sep 1954	-1.7°C30 Sep 1967	195 mm6 Sep 2011	477 mm1977 · driest 0 mm in 1955	87
October	36.1°C3 Oct 2019	-7.2°C30 Oct 1952	112 mm5 Oct 1995	222 mm2009 · driest 0 mm in 1921	91
November	31.1°C7 Nov 2003	-16.7°C25 Nov 1950	141 mm4 Nov 2004	387 mm1948 · driest 2 mm in 1934	90
December	27.2°C7 Dec 1951	-18.9°C25 Dec 1983	147 mm12 Dec 1961	344 mm1961 · driest 0 mm in 1955	88

Typical days per month at CHICKAMAUGA 2 SW, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)	Snow days
January	0	0	19	5	<1
February	<1	0	15	4	<1
March	3	<1	9	5	<1
April	11	<1	2	4	0
May	21	6	0	4	0
June	28	16	0	4	0
July	30	22	0	4	0
August	30	22	0	3	0
September	25	10	0	3	0
October	10	<1	2	3	0
November	1	<1	11	4	0
December	0	0	17	5	<1

The best month has moved. On the 1961–1990 numbers the strongest month here was May (scoring 75); on 2011–2025 it is October (83). Both are scored the same way, from the same station — only the climate underneath changed.

How often, not how much — every day in CHICKAMAUGA 2 SW’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%	31%	14%	36%	6.8–13.6°C
February	9%	32%	15%	41%	10.0–16.2°C
March	29%	29%	15%	34%	14.2–20.7°C
April	56%	27%	13%	30%	20.5–25.0°C
May	71%	27%	11%	32%	24.5–29.1°C
June	71%	29%	12%	36%	28.4–32.5°C
July	68%	32%	13%	39%	29.8–33.6°C
August	74%	26%	11%	28%	29.8–33.7°C
September	77%	22%	10%	21%	26.4–31.0°C
October	65%	18%	8%	17%	20.9–26.1°C
November	26%	24%	11%	27%	14.2–19.4°C
December	4%	28%	14%	34%	8.7–14.2°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.

1910Each stripe is one year’s mean temperature against the 62-year average. Warmest: 2023. Coolest: 1996.2023

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 4048202
NOAA station: USC00094941 · CHICKAMAUGA 2 SW
Station distance: 19.3 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 25 usable years
Daylight: Calculated from latitude 34.85°, 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 CHICKAMAUGA 2 SW is what differs

LaFayette→Chickamauga→Trenton→Linwood→Ascalon→Avans→

Or put two places side by side: Union vs LaFayette

Best time to visitUnion.

October

August

October

The whole year,without the guesswork.

Union runs +0.9°Con the 1961–1990 baseline.

Nearby, measured,and named.

Best time to visit
Union.

The whole year,
without the guesswork.

Union runs +0.9°C
on the 1961–1990 baseline.

Nearby, measured,
and named.