United States · 1991–2020

Best time to visit
Franklin.

September leads for comfortable weather in Franklin: typically 27.4°C by day, 15.4°C at night, with 97 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortSeptember

Typical high27.4°C

Typical low15.4°C

Rain in September97 mm

Comfort

September

September · May · October

76climate match

Beach

August

August · June · July

75climate match

Outdoors

October

October · April · November

79climate match

The weakest month is January, scoring 5 against September’s 76 — days reach only 7.1°C, 17° 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

57.1° / -2.5°

Feb

99.8° / -1°

Mar

2914.9° / 3.4°

Apr

5820.6° / 8.3°

May

7525° / 14°

Jun

6029.3° / 18.5°

Jul

4931.2° / 20.5°

Aug

5630.9° / 19.7°

Sep

7627.4° / 15.4°

Oct

6921.6° / 9.1°

Nov

3514.5° / 3.1°

Dec

59.1° / -0.6°

Monthly climate evidence for Franklin — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	7.1°C	-2.5°C	106 mm	8.8	9 h 54	5	Strong coverage
February	9.8°C	-1°C	110 mm	8.1	10 h 47	9	Strong coverage
March	14.9°C	3.4°C	128 mm	10.1	11 h 51	29	Strong coverage
April	20.6°C	8.3°C	124 mm	9.7	13 h 05	58	Strong coverage
May	25°C	14°C	135 mm	9.5	14 h 06	75	Strong coverage
June	29.3°C	18.5°C	111 mm	9.1	14 h 39	60	Strong coverage
July	31.2°C	20.5°C	120 mm	8.7	14 h 26	49	Strong coverage
August	30.9°C	19.7°C	105 mm	6.6	13 h 34	56	Strong coverage
September	27.4°C	15.4°C	97 mm	6.6	12 h 22	76	Strong coverage
October	21.6°C	9.1°C	95 mm	7	11 h 11	69	Strong coverage
November	14.5°C	3.1°C	94 mm	7.7	10 h 09	35	Strong coverage
December	9.1°C	-0.6°C	130 mm	9.8	9 h 39	5	Strong coverage

What has changed

Franklin runs +0.8°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

+1.5

Feb

+1.5

Mar

+1.1

Apr

+0.3

May

+0.3

Jun

+0.7

Jul

+0.7

Aug

+0.4

Sep

+0.4

Oct

+0.8

Nov

-0.2

Dec

+2.0

September daytime highs, 2011–2025. Last recorded: 29.7°C.

Records at PORTLAND SEWAGE PLT, 1955–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	23.3°C2 Jan 2022	-28.3°C24 Jan 1963	97 mm28 Jan 2009	290 mm1999 · driest 12 mm in 1984	70
February	27.2°C24 Feb 1996	-22.8°C2 Feb 1965	117 mm16 Feb 2025	263 mm2019 · driest 8 mm in 2010	69
March	31.1°C23 Mar 2026	-18.3°C5 Mar 1960	109 mm12 Mar 1975	380 mm1975 · driest 22 mm in 2007	69
April	31.7°C26 Apr 1989	-6.1°C8 Apr 1985	102 mm4 Apr 1968	238 mm1979 · driest 26 mm in 1992	70
May	34.4°C15 May 1962	-1.7°C1 May 1963	158 mm9 May 2024	389 mm2024 · driest 44 mm in 2012	69
June	41.1°C30 Jun 2012	2.2°C1 Jun 1966	205 mm23 Jun 1969	341 mm1998 · driest 2 mm in 1988	71
July	40.6°C1 Jul 2012	8.9°C6 Jul 1970	102 mm26 Jul 2022	295 mm2016 · driest 35 mm in 2010	69
August	40.6°C17 Aug 2007	6.7°C13 Aug 1964	157 mm30 Aug 2005	409 mm2005 · driest 9 mm in 2007	69
September	37.8°C8 Sep 1990	0.0°C25 Sep 1965	151 mm14 Sep 1979	279 mm1979 · driest 14 mm in 1983	69
October	35.0°C4 Oct 2019	-5.6°C26 Oct 1962	87 mm5 Oct 1995	243 mm2019 · driest 0 mm in 2024	70
November	30.0°C2 Nov 2016	-12.8°C22 Nov 1964	114 mm27 Nov 1973	253 mm1973 · driest 10 mm in 2009	69
December	24.4°C5 Dec 1998	-25.6°C22 Dec 1989	102 mm9 Dec 1978	355 mm1990 · driest 26 mm in 1965	70

Typical days per month at PORTLAND SEWAGE PLT, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)	Snow days
January	0	0	21	4	<1
February	<1	0	17	4	<1
March	2	0	10	5	<1
April	8	<1	2	4	0
May	18	5	<1	4	0
June	26	15	0	3	0
July	30	22	0	4	0
August	30	20	0	3	0
September	22	9	0	3	0
October	10	1	1	3	0
November	1	0	9	3	<1
December	0	0	18	4	<1

How often, not how much — every day in PORTLAND SEWAGE PLT’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%	28%	12%	34%	3.9–10.3°C
February	5%	29%	13%	34%	5.3–13.2°C
March	19%	30%	15%	37%	11.4–17.8°C
April	41%	31%	13%	38%	18.4–23.1°C
May	61%	31%	13%	38%	23.0–27.5°C
June	72%	27%	12%	30%	27.6–30.7°C
July	73%	27%	12%	28%	29.7–33.1°C
August	78%	22%	10%	23%	29.2–32.4°C
September	75%	22%	10%	21%	25.5–29.4°C
October	54%	21%	9%	20%	19.2–23.9°C
November	17%	26%	12%	28%	11.4–17.8°C
December	3%	28%	13%	34%	6.8–12.2°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.

1956Each stripe is one year’s mean temperature against the 58-year average. Warmest: 1998. Coolest: 1976.2025

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 4292193
NOAA station: USC00407359 · PORTLAND SEWAGE PLT
Station distance: 15.6 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 28 usable years
Daylight: Calculated from latitude 36.72°, 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 PORTLAND SEWAGE PLT is what differs

Portland→Orlinda→New Deal→Oak Grove→Mitchellville→Fairfield→

Or put two places side by side: Franklin vs Portland

Best time to visitFranklin.