United States · 1991–2020

Best time to visit
Lewisville.

April leads for comfortable weather in Lewisville: typically 24.6°C by day, 11.4°C at night, with 91 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortApril

Typical high24.6°C

Typical low11.4°C

Rain in April91 mm

Comfort

April

April · October · May

81climate match

Beach

June

June · September · July

73climate match

Outdoors

November

November · March · April

83climate match

The weakest month is January, scoring 33 against April’s 81 — days reach only 13.7°C, 10° 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

3313.7° / 0.6°

Feb

4516.1° / 3°

Mar

6220.2° / 7.2°

Apr

8124.6° / 11.4°

May

6528.5° / 16.8°

Jun

4733.2° / 21.3°

Jul

4335.6° / 23.2°

Aug

4335.9° / 22.9°

Sep

5831.8° / 18.8°

Oct

7326.3° / 12.1°

Nov

6219.4° / 6.5°

Dec

3814.7° / 1.7°

Monthly climate evidence for Lewisville — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	13.7°C	0.6°C	70 mm	5.6	10 h 11	33	Strong coverage
February	16.1°C	3°C	72 mm	5.8	10 h 57	45	Strong coverage
March	20.2°C	7.2°C	93 mm	7	11 h 53	62	Strong coverage
April	24.6°C	11.4°C	91 mm	6.1	12 h 57	81	Strong coverage
May	28.5°C	16.8°C	120 mm	8	13 h 51	65	Strong coverage
June	33.2°C	21.3°C	94 mm	6.2	14 h 19	47	Strong coverage
July	35.6°C	23.2°C	57 mm	4.1	14 h 08	43	Strong coverage
August	35.9°C	22.9°C	53 mm	4.7	13 h 22	43	Strong coverage
September	31.8°C	18.8°C	90 mm	5.1	12 h 20	58	Strong coverage
October	26.3°C	12.1°C	120 mm	6.2	11 h 18	73	Strong coverage
November	19.4°C	6.5°C	71 mm	5.4	10 h 25	62	Strong coverage
December	14.7°C	1.7°C	74 mm	5.7	9 h 59	38	Strong coverage

What has changed

Lewisville runs +0.9°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

+1.7

Feb

+1.3

Mar

+1.4

Apr

+0.6

May

+0.5

Jun

+1.3

Jul

+1.0

Aug

+0.7

Sep

+1.6

Oct

+0.5

Nov

+0.1

Dec

+0.6

April daytime highs, 2011–2022. Last recorded: 27.6°C.

Records at GRAPEVINE DAM, 1897–2023
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	35.0°C31 Jan 1911	-18.3°C12 Jan 1918	100 mm31 Jan 2002	188 mm1998 · driest 0 mm in 1897	87
February	35.0°C23 Feb 1996	-16.1°C13 Feb 1905	100 mm25 Feb 2006	221 mm1997 · driest 0 mm in 1897	85
March	37.8°C21 Mar 1916	-10.6°C4 Mar 2014	124 mm27 Mar 1977	224 mm1902 · driest 0 mm in 1897	85
April	38.3°C18 Apr 2006	-1.7°C9 Apr 2003	101 mm30 Apr 1966	426 mm1957 · driest 8 mm in 1961	84
May	40.6°C31 May 1911	0.6°C1 May 1903	164 mm17 May 1989	466 mm2015 · driest 7 mm in 1996	83
June	42.8°C29 Jun 1917	8.3°C1 Jun 1903	211 mm14 Jun 1989	430 mm1989 · driest 0 mm in 1999	83
July	44.4°C28 Jul 1912	9.4°C26 Jul 2004	191 mm29 Jul 2004	266 mm1902 · driest 0 mm in 1980	86
August	46.1°C18 Aug 1909	12.2°C31 Aug 1915	129 mm18 Aug 1915	171 mm1915 · driest 0 mm in 2000	85
September	42.8°C5 Sep 1998	3.3°C23 Sep 1995	220 mm21 Sep 1964	424 mm1964 · driest 1 mm in 2019	84
October	38.9°C3 Oct 1904	-5.6°C31 Oct 1993	127 mm19 Oct 2002	364 mm2018 · driest 0 mm in 1975	82
November	33.9°C6 Nov 2017	-8.3°C25 Nov 1992	121 mm27 Nov 2015	281 mm2015 · driest 0 mm in 1903	84
December	32.8°C4 Dec 2005	-18.3°C23 Dec 1989	93 mm21 Dec 1991	232 mm1991 · driest 0 mm in 1909	83

Typical days per month at GRAPEVINE DAM, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)
January	1	0	14	2
February	3	<1	8	2
March	8	<1	3	3
April	16	3	<1	3
May	25	12	0	4
June	29	25	0	3
July	29	29	0	2
August	30	28	0	2
September	26	21	0	2
October	19	9	<1	3
November	5	<1	4	2
December	1	0	11	2

How often, not how much — every day in GRAPEVINE 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	20%	14%	5%	10%	9.8–16.3°C
February	28%	18%	7%	14%	11.9–19.6°C
March	49%	18%	8%	14%	16.6–24.2°C
April	68%	21%	11%	18%	22.4–26.6°C
May	75%	24%	12%	23%	26.5–30.6°C
June	81%	18%	8%	17%	31.1–35.0°C
July	86%	14%	6%	11%	33.0–38.0°C
August	87%	13%	5%	11%	33.1–37.8°C
September	83%	16%	7%	13%	29.3–34.7°C
October	75%	16%	8%	15%	24.0–28.2°C
November	46%	15%	7%	12%	16.6–22.1°C
December	19%	16%	6%	14%	11.3–16.7°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.

1902Each stripe is one year’s mean temperature against the 68-year average. Warmest: 1911. Coolest: 1983.2019

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 4706057
NOAA station: USC00413691 · GRAPEVINE DAM
Station distance: 12.1 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 28 usable years
Daylight: Calculated from latitude 33.05°, 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 GRAPEVINE DAM is what differs

Flower Mound→Grapevine→Coppell→Southlake→Colleyville→Double Oak→

Or put two places side by side: Lewisville vs Flower Mound

Best time to visitLewisville.