United States · 1991–2020

Best time to visit
Dorchester.

August leads for comfortable weather in Dorchester: typically 25°C by day, 13.1°C at night, with 109 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortAugust

Typical high25°C

Typical low13.1°C

Rain in August109 mm

Comfort

August

August · July · June

78climate match

Beach

July

July · August · June

54climate match

Outdoors

September

September · May · June

77climate match

The weakest month is January, scoring 5 against August’s 78 — days reach only -6.4°C, 30° 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

5-6.4° / -16.4°

Feb

5-3.4° / -14.6°

Mar

53.4° / -7.8°

Apr

1811.3° / -0.7°

May

5318.8° / 6.4°

Jun

7523.7° / 12°

Jul

7726° / 14.2°

Aug

7825° / 13.1°

Sep

6320.6° / 8.5°

Oct

2612.7° / 1.4°

Nov

53.7° / -4.9°

Dec

5-3.4° / -11.8°

Monthly climate evidence for Dorchester — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	-6.4°C	-16.4°C	28 mm	6.2	9 h 07	5	Strong coverage
February	-3.4°C	-14.6°C	26 mm	4.8	10 h 20	5	Strong coverage
March	3.4°C	-7.8°C	43 mm	6.4	11 h 46	5	Strong coverage
April	11.3°C	-0.7°C	76 mm	9.3	13 h 25	18	Strong coverage
May	18.8°C	6.4°C	94 mm	10.2	14 h 49	53	Strong coverage
June	23.7°C	12°C	123 mm	10	15 h 35	75	Strong coverage
July	26°C	14.2°C	101 mm	9	15 h 17	77	Strong coverage
August	25°C	13.1°C	109 mm	8.4	14 h 04	78	Strong coverage
September	20.6°C	8.5°C	99 mm	9.1	12 h 28	63	Strong coverage
October	12.7°C	1.4°C	83 mm	8.7	10 h 53	26	Strong coverage
November	3.7°C	-4.9°C	48 mm	6.1	9 h 29	5	Strong coverage
December	-3.4°C	-11.8°C	36 mm	6.8	8 h 47	5	Strong coverage

What has changed

Dorchester runs +0.2°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

+0.6

Feb

-0.9

Mar

+1.0

Apr

-1.9

May

-0.4

Jun

+0.6

Jul

0.0

Aug

+0.1

Sep

+1.6

Oct

-0.3

Nov

+0.3

Dec

+1.9

August daytime highs, 2011–2023. Last recorded: 25.4°C.

Records at MEDFORD, 1893–2025
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	11.1°C23 Jan 1942	-40.0°C6 Jan 1912	38 mm29 Jan 1914	87 mm1935 · driest 2 mm in 1981	132
February	15.6°C27 Feb 1896	-42.8°C10 Feb 1899	40 mm29 Feb 2012	121 mm2019 · driest 0 mm in 2002	132
March	25.6°C29 Mar 1910	-40.0°C1 Mar 1962	55 mm16 Mar 2016	118 mm2016 · driest 3 mm in 1910	130
April	31.7°C29 Apr 1952	-20.0°C8 Apr 1923	80 mm5 Apr 1910	151 mm2001 · driest 12 mm in 1901	130
May	38.3°C30 May 1934	-8.9°C4 May 1900	70 mm6 May 1936	235 mm1903 · driest 16 mm in 1925	132
June	39.4°C19 Jun 1900	-5.6°C1 Jun 1910	203 mm5 Jun 1905	412 mm1905 · driest 3 mm in 1912	131
July	40.0°C13 Jul 1936	1.1°C30 Jul 1899	121 mm8 Jul 1959	234 mm1972 · driest 18 mm in 1947	129
August	37.8°C21 Aug 1901	-1.1°C30 Aug 1931	105 mm31 Aug 1938	273 mm1941 · driest 14 mm in 1970	128
September	37.2°C2 Sep 1898	-11.7°C30 Sep 1899	109 mm9 Sep 1938	329 mm1942 · driest 8 mm in 1952	129
October	31.7°C2 Oct 1976	-16.7°C30 Oct 1925	132 mm4 Oct 1900	273 mm1900 · driest 2 mm in 1953	131
November	22.8°C1 Nov 1944	-28.3°C30 Nov 1976	67 mm11 Nov 1915	164 mm1991 · driest 4 mm in 1939	131
December	15.6°C6 Dec 2001	-35.0°C25 Dec 1933	61 mm28 Dec 1904	121 mm2015 · driest 0 mm in 1898	132

Typical days per month at MEDFORD, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)	Snow days
January	0	0	31	<1	6
February	0	0	27	<1	4
March	0	0	27	1	3
April	<1	0	17	3	2
May	5	<1	3	4	<1
June	13	2	0	4	0
July	20	4	0	3	0
August	18	3	0	3	0
September	7	1	1	3	0
October	<1	0	13	3	<1
November	0	0	26	2	2
December	0	0	30	<1	6

The best month has moved. On the 1961–1990 numbers the strongest month here was August (scoring 82); on 2011–2025 it is July (82). Both are scored the same way, from the same station — only the climate underneath changed.

How often, not how much — every day in MEDFORD’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	0%	18%	2%	14%	-9.3–-2.5°C
February	0%	17%	3%	13%	-6.6–-0.1°C
March	<1%	20%	5%	20%	-0.1–6.7°C
April	10%	27%	8%	32%	8.4–15.3°C
May	36%	31%	12%	39%	16.0–21.6°C
June	58%	33%	13%	43%	21.9–27.2°C
July	70%	29%	12%	31%	24.6–29.2°C
August	69%	28%	11%	30%	23.3–27.7°C
September	42%	29%	11%	34%	18.5–23.1°C
October	15%	24%	7%	25%	10.5–16.4°C
November	<1%	21%	5%	19%	0.7–7.1°C
December	0%	19%	3%	16%	-6.7–-0.3°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.

1893Each stripe is one year’s mean temperature against the 123-year average. Warmest: 1998. Coolest: 1917.2023

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 5250787
NOAA station: USC00475255 · MEDFORD
Station distance: 14.2 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 29 usable years
Daylight: Calculated from latitude 45.00°, 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 MEDFORD is what differs

Medford→Athens→Rib Lake→Stetsonville→Chelsea→Whittlesey→

Or put two places side by side: Dorchester vs Medford

Best time to visitDorchester.