United States · 1991–2020

Best time to visit
Lowell.

September leads for comfortable weather in Lowell: typically 24.1°C by day, 10.9°C at night, with 42 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortSeptember

Typical high24.1°C

Typical low10.9°C

Rain in September42 mm

Comfort

September

September · July · August

90climate match

Beach

July

July · August · September

70climate match

Outdoors

June

June · September · May

86climate match

The weakest month is January, scoring 5 against September’s 90 — days reach only 8.9°C, 15° 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

58.9° / 2.5°

Feb

1410.8° / 2.9°

Mar

1913° / 4°

Apr

3115.4° / 5.5°

May

5618.9° / 7.8°

Jun

7922.1° / 10.1°

Jul

8527.1° / 12.3°

Aug

8427.3° / 12.2°

Sep

9024.1° / 10.9°

Oct

5317.7° / 8.1°

Nov

1211.7° / 4.9°

Dec

58.3° / 2.4°

Monthly climate evidence for Lowell — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	8.9°C	2.5°C	155 mm	14.9	9 h 14	5	Strong coverage
February	10.8°C	2.9°C	117 mm	13.6	10 h 24	14	Strong coverage
March	13°C	4°C	128 mm	15.9	11 h 47	19	Strong coverage
April	15.4°C	5.5°C	122 mm	15.4	13 h 22	31	Strong coverage
May	18.9°C	7.8°C	87 mm	10.8	14 h 43	56	Strong coverage
June	22.1°C	10.1°C	51 mm	7	15 h 27	79	Strong coverage
July	27.1°C	12.3°C	13 mm	2.1	15 h 10	85	Strong coverage
August	27.3°C	12.2°C	14 mm	2.2	14 h	84	Strong coverage
September	24.1°C	10.9°C	42 mm	5	12 h 27	90	Strong coverage
October	17.7°C	8.1°C	88 mm	10.1	10 h 55	53	Strong coverage
November	11.7°C	4.9°C	163 mm	15.2	9 h 35	12	Strong coverage
December	8.3°C	2.4°C	176 mm	16	8 h 55	5	Strong coverage

What has changed

Lowell 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

+0.2

Feb

-1.1

Mar

-0.4

Apr

+0.2

May

+0.3

Jun

+0.6

Jul

+1.1

Aug

+1.2

Sep

+0.3

Oct

-0.1

Nov

-0.1

Dec

-0.2

September daytime highs, 2011–2025. Last recorded: 24.6°C.

Records at LOOKOUT PT DAM, 1955–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	21.7°C18 Jan 2018	-14.4°C1 Jan 1979	90 mm4 Jan 1966	335 mm2006 · driest 19 mm in 1985	71
February	22.8°C20 Feb 1995	-13.9°C5 Feb 1989	103 mm10 Feb 1961	318 mm1961 · driest 38 mm in 1964	71
March	26.1°C31 Mar 2003	-5.6°C4 Mar 2019	56 mm16 Mar 2025	272 mm2012 · driest 19 mm in 1965	71
April	29.4°C25 Apr 2018	-2.2°C29 Apr 1970	65 mm10 Apr 1992	248 mm2019 · driest 18 mm in 2021	71
May	33.9°C17 May 2008	-1.1°C19 May 1987	52 mm28 May 2004	195 mm2005 · driest 5 mm in 2018	71
June	43.9°C28 Jun 2021	2.2°C4 Jun 1976	34 mm2 Jun 2006	156 mm1969 · driest 2 mm in 2003	71
July	38.9°C29 Jul 2009	4.4°C15 Jul 1969	38 mm19 Jul 1987	90 mm1987 · driest 0 mm in 2013	71
August	41.1°C10 Aug 1981	5.6°C18 Aug 1973	53 mm23 Aug 1989	130 mm1968 · driest 0 mm in 1969	70
September	38.3°C1 Sep 1987	0.6°C27 Sep 1999	60 mm30 Sep 2013	208 mm2013 · driest 1 mm in 2012	71
October	31.7°C7 Oct 1987	-3.3°C30 Oct 2019	51 mm10 Oct 1955	275 mm2016 · driest 3 mm in 1987	71
November	23.3°C5 Nov 2020	-8.9°C15 Nov 1955	140 mm19 Nov 1996	430 mm1973 · driest 35 mm in 2019	71
December	22.2°C18 Dec 1979	-16.1°C21 Dec 1990	117 mm6 Dec 1981	401 mm1964 · driest 31 mm in 1976	70

Typical days per month at LOOKOUT PT DAM, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)
January	0	0	8	5
February	0	0	5	4
March	<1	0	2	4
April	<1	0	<1	4
May	4	<1	0	3
June	8	2	0	2
July	22	9	0	<1
August	24	8	0	<1
September	14	3	0	2
October	2	<1	<1	3
November	0	0	3	6
December	0	0	7	6

How often, not how much — every day in LOOKOUT PT DAM’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%	49%	16%	67%	6.4–10.4°C
February	<1%	50%	14%	69%	8.8–13.1°C
March	5%	51%	14%	70%	10.8–15.0°C
April	15%	47%	11%	63%	13.3–17.3°C
May	37%	35%	9%	44%	17.0–21.0°C
June	64%	22%	6%	23%	20.1–24.5°C
July	90%	7%	1%	4%	24.5–29.3°C
August	89%	9%	2%	9%	25.2–29.2°C
September	72%	19%	5%	20%	21.4–25.9°C
October	28%	33%	10%	46%	16.0–19.7°C
November	1%	51%	18%	71%	10.0–13.2°C
December	0%	53%	19%	70%	6.5–10.5°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 69-year average. Warmest: 2015. Coolest: 1985.2025

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 5738222
NOAA station: USC00355050 · LOOKOUT PT DAM
Station distance: 2 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 30 usable years
Daylight: Calculated from latitude 43.92°, 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 LOOKOUT PT DAM is what differs

Unity→Fall Creek→Armet (historical)→Dexter→Goshen→Jasper→

Or put two places side by side: Lowell vs Unity

Best time to visitLowell.