United States · 1991–2020

Best time to visit
Duluth.

October leads for comfortable weather in Duluth: typically 23.4°C by day, 11.3°C at night, with 81 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortOctober

Typical high23.4°C

Typical low11.3°C

Rain in October81 mm

Comfort

October

October · May · April

82climate match

Beach

September

September · August · June

75climate match

Outdoors

October

October · April · November

77climate match

The weakest month is January, scoring 18 against October’s 82 — days reach only 11.5°C, 12° below the 24°C the score treats as ideal, and nights drop to 0.6°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

1811.5° / 0.6°

Feb

2913.9° / 2.6°

Mar

4918.4° / 6.2°

Apr

7422.9° / 10.2°

May

7627.3° / 15.2°

Jun

5230.9° / 19.6°

Jul

4432.1° / 21.4°

Aug

4731.8° / 21.1°

Sep

6728.7° / 17.8°

Oct

8223.4° / 11.3°

Nov

4917.6° / 5.4°

Dec

2412.8° / 2.3°

Monthly climate evidence for Duluth — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	11.5°C	0.6°C	105 mm	8.6	10 h 07	18	Good coverage
February	13.9°C	2.6°C	107 mm	8.6	10 h 55	29	Good coverage
March	18.4°C	6.2°C	115 mm	8.5	11 h 52	49	Good coverage
April	22.9°C	10.2°C	102 mm	7.9	12 h 59	74	Good coverage
May	27.3°C	15.2°C	98 mm	7.8	13 h 54	76	Good coverage
June	30.9°C	19.6°C	118 mm	9	14 h 24	52	Good coverage
July	32.1°C	21.4°C	120 mm	9	14 h 13	44	Good coverage
August	31.8°C	21.1°C	114 mm	8.7	13 h 25	47	Good coverage
September	28.7°C	17.8°C	107 mm	5.7	12 h 21	67	Good coverage
October	23.4°C	11.3°C	81 mm	5.6	11 h 16	82	Good coverage
November	17.6°C	5.4°C	101 mm	6.8	10 h 21	49	Good coverage
December	12.8°C	2.3°C	116 mm	8.8	9 h 54	24	Good coverage

Records at ATLANTA DEKALB PEACHTREE AP, 1998–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	25.6°C1 Jan 2022	-14.9°C7 Jan 2014	71 mm19 Jan 2002	215 mm2023 · driest 60 mm in 2005	28
February	26.7°C24 Feb 2018	-11.0°C19 Feb 2015	75 mm26 Feb 2026	251 mm2020 · driest 38 mm in 2012	28
March	32.2°C25 Mar 2007	-6.7°C1 Mar 2002	68 mm30 Mar 2002	212 mm2005 · driest 40 mm in 2004	29
April	31.7°C18 Apr 2002	-2.1°C5 Apr 2011	83 mm19 Apr 2019	227 mm1998 · driest 35 mm in 1999	29
May	34.4°C26 May 2012	2.8°C10 May 2020	104 mm3 May 2010	290 mm2003 · driest 5 mm in 2007	29
June	40.6°C30 Jun 2012	10.6°C7 Jun 2000	123 mm20 Jun 2017	302 mm2003 · driest 26 mm in 2024	29
July	40.6°C1 Jul 2012	13.3°C30 Jul 2014	91 mm25 Jul 2001	318 mm2005 · driest 47 mm in 2011	29
August	38.9°C22 Aug 2007	12.2°C27 Aug 2025	93 mm28 Aug 2023	240 mm2023 · driest 10 mm in 2011	28
September	36.7°C9 Sep 2019	5.6°C28 Sep 2022	149 mm21 Sep 2009	404 mm2009 · driest 8 mm in 2005	28
October	36.1°C4 Oct 2019	-2.8°C28 Oct 2001	96 mm10 Oct 2020	226 mm2009 · driest 0 mm in 2024	28
November	28.3°C2 Nov 2003	-7.7°C22 Nov 2008	99 mm10 Nov 2009	238 mm2015 · driest 26 mm in 2021	28
December	25.6°C27 Dec 2025	-13.8°C24 Dec 2022	79 mm28 Dec 2018	305 mm2018 · driest 25 mm in 2010	28

Typical days per month at ATLANTA DEKALB PEACHTREE AP, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)
January	<1	0	16	3
February	<1	0	11	4
March	4	0	4	4
April	12	1	<1	3
May	24	9	0	3
June	29	20	0	4
July	31	26	0	4
August	30	25	0	3
September	26	13	0	3
October	13	1	<1	2
November	2	0	4	3
December	<1	0	12	4

How often, not how much — every day in ATLANTA DEKALB PEACHTREE 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	6%	28%	12%	30%	8.8–14.3°C
February	15%	30%	13%	36%	11.4–17.1°C
March	38%	28%	13%	29%	16.1–21.3°C
April	62%	25%	11%	24%	21.4–24.8°C
May	72%	26%	10%	31%	25.3–28.7°C
June	70%	30%	12%	40%	29.0–32.7°C
July	69%	31%	13%	38%	30.7–33.6°C
August	71%	29%	12%	35%	30.2–33.5°C
September	81%	19%	9%	20%	26.8–31.3°C
October	68%	17%	7%	15%	21.8–24.8°C
November	32%	22%	11%	21%	15.1–20.1°C
December	10%	28%	11%	32%	10.4–15.4°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.

1999Each stripe is one year’s mean temperature against the 27-year average. Warmest: 2016. Coolest: 2014.2025

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 4192289
NOAA station: USW00053863 · ATLANTA DEKALB PEACHTREE AP
Station distance: 19.8 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 22 usable years
Daylight: Calculated from latitude 34.00°, 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 ATLANTA DEKALB PEACHTREE AP is what differs

Sandy Springs→Roswell→Johns Creek→Alpharetta→Brookhaven→Stonecrest→

Or put two places side by side: Duluth vs Sandy Springs

Best time to visitDuluth.

October

September

October

The whole year,without the guesswork.

Nearby, measured,and named.

Best time to visit
Duluth.

The whole year,
without the guesswork.

Nearby, measured,
and named.