United States · 1991–2020

Best time to visit
Markham.

March leads for comfortable weather in Markham: typically 22.9°C by day, 12.5°C at night, with 73 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortMarch

Typical high22.9°C

Typical low12.5°C

Rain in March73 mm

Comfort

March

March · April · November

84climate match

Beach

May

May · October · April

81climate match

Outdoors

February

February · March · December

90climate match

The weakest month is July, scoring 39 against March’s 84 — days average 33.2°C, 9° above 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

5317.8° / 7°

Feb

6919.8° / 9.4°

Mar

8422.9° / 12.5°

Apr

8326.1° / 16°

May

6229.3° / 19.9°

Jun

4032.1° / 23°

Jul

3933.2° / 23.8°

Aug

3933.6° / 23.6°

Sep

4331.6° / 21.3°

Oct

7128° / 16.8°

Nov

7922.8° / 11.7°

Dec

5918.9° / 8.3°

Monthly climate evidence for Markham — daylight is calculated from latitude, everything else is measured, sea temperature from the nearest open water 42 km away
Month	Day	Night	Rain	Wet days	Sea	Daylight	Comfort	Coverage
January	17.8°C	7°C	95 mm	7.4	16.8°C	10 h 29	53	Strong coverage
February	19.8°C	9.4°C	64 mm	6.1	16.7°C	11 h 07	69	Strong coverage
March	22.9°C	12.5°C	73 mm	5.2	18.4°C	11 h 55	84	Strong coverage
April	26.1°C	16°C	81 mm	4.5	21.5°C	12 h 49	83	Strong coverage
May	29.3°C	19.9°C	104 mm	5.5	25.2°C	13 h 35	62	Strong coverage
June	32.1°C	23°C	145 mm	7	28.3°C	13 h 59	40	Strong coverage
July	33.2°C	23.8°C	116 mm	7.3	29.4°C	13 h 49	39	Strong coverage
August	33.6°C	23.6°C	107 mm	6.9	29.7°C	13 h 11	39	Strong coverage
September	31.6°C	21.3°C	146 mm	8.2	29.1°C	12 h 18	43	Strong coverage
October	28°C	16.8°C	102 mm	6.3	26.1°C	11 h 25	71	Good coverage
November	22.8°C	11.7°C	94 mm	6	22.1°C	10 h 40	79	Good coverage
December	18.9°C	8.3°C	94 mm	7.5	18.9°C	10 h 18	59	Strong coverage

What has changed

Markham runs +0.4°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

+0.9

Feb

+1.2

Mar

+0.8

Apr

+0.5

May

+0.2

Jun

+0.5

Jul

-0.1

Aug

+0.3

Sep

+0.1

Oct

+0.4

Nov

-0.8

Dec

+1.0

March daytime highs, 2011–2025. Last recorded: 26.2°C.

Records at BAY CITY WTR WKS, 1912–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	30.0°C3 Jan 2005	-11.7°C31 Jan 1949	159 mm29 Jan 1989	329 mm1991 · driest 4 mm in 1914	86
February	32.2°C28 Feb 1954	-12.2°C16 Feb 2021	98 mm3 Feb 1992	243 mm1959 · driest 4 mm in 1954	87
March	32.8°C30 Mar 1974	-5.6°C2 Mar 1980	113 mm21 Mar 1979	243 mm1997 · driest 0 mm in 1916	88
April	34.4°C23 Apr 2015	1.1°C9 Apr 1973	160 mm4 Apr 1991	279 mm1991 · driest 0 mm in 2011	87
May	36.7°C1 May 1953	3.9°C4 May 2013	182 mm7 May 1982	410 mm2021 · driest 0 mm in 1998	83
June	41.1°C30 Jun 2013	13.9°C25 Jun 1974	212 mm5 Jun 2019	525 mm2004 · driest 1 mm in 1914	87
July	41.7°C17 Jul 1998	16.1°C16 Jul 1967	141 mm11 Jul 2012	451 mm2024 · driest 0 mm in 1947	86
August	41.7°C28 Aug 2023	15.0°C31 Aug 2018	184 mm30 Aug 1953	428 mm2017 · driest 8 mm in 1987	86
September	42.8°C4 Sep 2000	7.8°C27 Sep 1942	232 mm18 Sep 2019	508 mm1961 · driest 8 mm in 1975	86
October	36.1°C8 Oct 1956	-1.7°C30 Oct 1993	172 mm13 Oct 2004	603 mm1984 · driest 0 mm in 2024	84
November	36.1°C7 Nov 2024	-4.4°C18 Nov 1959	158 mm4 Nov 1965	316 mm2000 · driest 9 mm in 1973	83
December	31.1°C5 Dec 1912	-13.9°C22 Dec 1989	158 mm16 Dec 1995	234 mm1960 · driest 0 mm in 1977	82

Typical days per month at BAY CITY WTR WKS, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)
January	2	0	3	3
February	4	0	1	2
March	11	<1	<1	2
April	22	3	0	2
May	29	14	0	3
June	30	27	0	4
July	31	29	0	3
August	30	29	0	3
September	29	24	0	4
October	25	10	0	3
November	14	<1	<1	3
December	4	0	2	3

The best month has moved. On the 1961–1990 numbers the strongest month here was April (scoring 87); on 2011–2025 it is March (90). Both are scored the same way, from the same station — only the climate underneath changed.

How often, not how much — every day in BAY CITY WTR WKS’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	35%	23%	8%	23%	14.7–21.0°C
February	47%	22%	8%	18%	16.6–22.5°C
March	68%	16%	6%	12%	20.6–24.9°C
April	82%	15%	7%	10%	24.2–27.8°C
May	81%	19%	10%	17%	27.6–30.5°C
June	79%	21%	10%	22%	30.9–33.3°C
July	78%	22%	10%	22%	32.0–34.7°C
August	76%	24%	10%	28%	32.4–35.2°C
September	73%	27%	12%	29%	30.2–33.2°C
October	78%	20%	10%	19%	27.0–29.9°C
November	62%	20%	8%	18%	20.2–25.5°C
December	42%	23%	9%	23%	16.7–21.5°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.

1915Each stripe is one year’s mean temperature against the 60-year average. Warmest: 2000. Coolest: 1974.2024

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 4709193
NOAA station: USC00410569 · BAY CITY WTR WKS
Station distance: 9 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 23 usable years
Daylight: Calculated from latitude 28.96°, mid-month, sunrise to sunset including refraction. Not a station measurement.
Sea temperature: NOAA OISST v2.1 1991–2020 monthly climatology, nearest open water 42 km from the place centre. A sheltered bay can run warmer than the open sea it is measured from.
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 BAY CITY WTR WKS is what differs

Bay City→Van Vleck→Abercrombie→Allenhurst→Ashwood→Buckeye→

Or put two places side by side: Markham vs Bay City

Best time to visitMarkham.

March

May

February

The whole year,without the guesswork.

Markham runs +0.4°Con the 1961–1990 baseline.

Nearby, measured,and named.

Best time to visit
Markham.

The whole year,
without the guesswork.

Markham runs +0.4°C
on the 1961–1990 baseline.

Nearby, measured,
and named.