United States · 1991–2020

Best time to visit
Lapham Junction.

July leads for comfortable weather in Lapham Junction: typically 27.3°C by day, 14.5°C at night, with 107 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortJuly

Typical high27.3°C

Typical low14.5°C

Rain in July107 mm

Comfort

July

July · August · June

74climate match

Beach

July

July · August · June

58climate match

Outdoors

September

September · May · October

77climate match

The weakest month is January, scoring 5 against July’s 74 — days reach only -4.3°C, 28° 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

5-4.3° / -14.7°

Feb

5-1.7° / -13.4°

Mar

55.1° / -6.8°

Apr

2312.7° / 0°

May

5519.8° / 6.8°

Jun

7225° / 12.4°

Jul

7427.3° / 14.5°

Aug

7426.2° / 13.2°

Sep

7021.9° / 8.5°

Oct

3614.4° / 2.3°

Nov

55.9° / -4.2°

Dec

5-1.3° / -10.6°

Monthly climate evidence for Lapham Junction — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	-4.3°C	-14.7°C	28 mm	5.5	9 h 12	5	Strong coverage
February	-1.7°C	-13.4°C	25 mm	4.3	10 h 23	5	Strong coverage
March	5.1°C	-6.8°C	48 mm	6.6	11 h 47	5	Strong coverage
April	12.7°C	0°C	89 mm	9	13 h 23	23	Strong coverage
May	19.8°C	6.8°C	107 mm	10.2	14 h 45	55	Strong coverage
June	25°C	12.4°C	133 mm	10.2	15 h 30	72	Strong coverage
July	27.3°C	14.5°C	107 mm	8.2	15 h 12	74	Strong coverage
August	26.2°C	13.2°C	109 mm	8.5	14 h 01	74	Strong coverage
September	21.9°C	8.5°C	84 mm	8.4	12 h 27	70	Strong coverage
October	14.4°C	2.3°C	71 mm	7.5	10 h 54	36	Strong coverage
November	5.9°C	-4.2°C	46 mm	5.7	9 h 33	5	Strong coverage
December	-1.3°C	-10.6°C	38 mm	5.8	8 h 52	5	Strong coverage

What has changed

Lapham Junction runs +0.6°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

+1.2

Feb

-0.1

Mar

+1.6

Apr

-1.1

May

-0.3

Jun

+0.7

Jul

+0.2

Aug

+0.3

Sep

+1.8

Oct

+0.4

Nov

+0.8

Dec

+2.2

July daytime highs, 2011–2025. Last recorded: 29.0°C.

Records at MATHER 3 NW, 1903–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	14.4°C26 Jan 1981	-41.7°C30 Jan 1951	34 mm9 Jan 2026	78 mm1929 · driest 0 mm in 1955	121
February	20.0°C28 Feb 2024	-39.4°C15 Feb 2020	52 mm15 Feb 1918	94 mm1922 · driest 0 mm in 1958	117
March	28.9°C30 Mar 1986	-38.3°C1 Mar 1962	48 mm16 Mar 2016	124 mm2016 · driest 0 mm in 1910	121
April	33.3°C30 Apr 1952	-16.1°C5 Apr 2018	63 mm25 Apr 1994	195 mm2026 · driest 15 mm in 1997	121
May	35.6°C31 May 1934	-8.9°C2 May 1911	84 mm25 May 1945	260 mm2004 · driest 13 mm in 1934	122
June	40.6°C1 Jun 1934	-1.1°C4 Jun 1945	119 mm27 Jun 1986	277 mm1925 · driest 8 mm in 1910	123
July	41.1°C15 Jul 1936	0.0°C1 Jul 1929	108 mm15 Jul 2010	402 mm1999 · driest 1 mm in 1937	123
August	41.7°C24 Aug 1948	-2.2°C8 Aug 1904	141 mm23 Aug 1975	350 mm1980 · driest 4 mm in 1969	123
September	38.3°C7 Sep 1922	-7.8°C29 Sep 1949	85 mm16 Sep 1992	279 mm1986 · driest 9 mm in 1979	122
October	32.8°C7 Oct 1963	-16.1°C30 Oct 1925	64 mm6 Oct 1995	211 mm1911 · driest 6 mm in 1952	123
November	25.6°C1 Nov 1950	-24.4°C27 Nov 1977	55 mm15 Nov 1927	147 mm1934 · driest 3 mm in 1917	121
December	17.8°C16 Dec 2021	-33.9°C19 Dec 1983	48 mm14 Dec 2015	140 mm2015 · driest 3 mm in 1943	120

Typical days per month at MATHER 3 NW, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)	Snow days
January	0	0	30	<1	6
February	0	0	28	<1	5
March	<1	0	27	1	3
April	1	<1	17	3	2
May	7	1	2	4	0
June	17	3	0	5	0
July	24	8	0	3	0
August	21	4	0	3	0
September	10	1	1	3	0
October	2	0	12	2	<1
November	0	0	25	2	2
December	0	0	30	<1	6

The best month has moved. On the 1961–1990 numbers the strongest month here was June (scoring 80); on 2011–2025 it is September (82). Both are scored the same way, from the same station — only the climate underneath changed.

How often, not how much — every day in MATHER 3 NW’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%	17%	3%	13%	-8.0–-1.0°C
February	0%	15%	3%	9%	-5.6–2.0°C
March	2%	21%	5%	22%	0.8–9.1°C
April	13%	28%	9%	35%	9.9–16.0°C
May	39%	31%	11%	38%	17.2–22.8°C
June	60%	33%	12%	41%	22.9–27.6°C
July	73%	26%	10%	28%	25.8–30.0°C
August	72%	26%	10%	28%	24.6–28.7°C
September	50%	27%	10%	32%	19.6–24.5°C
October	21%	23%	6%	22%	12.4–18.3°C
November	2%	21%	6%	20%	2.2–8.8°C
December	0%	18%	3%	13%	-5.5–1.5°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.

1904Each stripe is one year’s mean temperature against the 108-year average. Warmest: 2024. Coolest: 1917.2025

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 5259518
NOAA station: USC00475164 · MATHER 3 NW
Station distance: 17.1 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 29 usable years
Daylight: Calculated from latitude 44.30°, 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 MATHER 3 NW is what differs

Tomah→Warrens→Wyeville→Millston→City Point→Kirby→

Or put two places side by side: Lapham Junction vs Tomah

Best time to visitLapham Junction.

July

July

September

The whole year,without the guesswork.

Lapham Junction runs +0.6°Con the 1961–1990 baseline.

Nearby, measured,and named.

Best time to visit
Lapham Junction.

The whole year,
without the guesswork.

Lapham Junction runs +0.6°C
on the 1961–1990 baseline.

Nearby, measured,
and named.