The Frontier Gazette & Almanack
“Fair Warning for Every Town Under the Sky” · Est. 1881
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Wyoming Weather in May

Wyoming in May

The short of it: Wyoming in May averages a high of 19 °C (66 °F) and a low of 7 °C (45 °F), with 90 mm (3.5 in) of rain and about 14 h 38 min of daylight. Rated 3 of 5 for a visit; the best months are September and June. Source: TerraClimate climate normals, 1991–2020.

Average high 19° · low 7° · rain 90 mm · daylight 14 h 38 min

✦✦✦ Fair for a visit · best months: September & June

Thirty years of records give Wyoming an average May high of 19°, a low of 7° and some 90 mm of rain. Spring takes hold here: highs climb 7° from April to about 19°, with nights near 7°. Wet spells are common — about 90 mm, the 2nd wettest month.

The sun is up for about 14 h 38 min in mid-May, 77 minutes more than a month before.

For the traveller: pack layers, a wool coat and stout boots, and an oilskin besides. The Almanac rates May 3 of 5 for a visit; the finest months here are September and June.

Against its neighbours, Wyoming runs cooler than most and wetter than most in May. Petrolia, 8 km to the SSW, sees much the same highs.

May in Wyoming, by the numbers

Warmth rank
5th warmest of 12
Rain rank
2nd wettest of 12
Versus April
7° warmer, 2.0 mm more rain
Versus June
5° colder
Day–night spread
11°
Snow season
Dec–Mar
Daylight, mid-month
14 h 38 min
Average wind
14 km/h

Neighbouring Towns

May averages · distance by the crow’s flight
TownDistanceHighLowRain
PetroliaOntario8 km SSW19°7°91 mm
CamlachieOntario10 km NNW18°7°87 mm
ForestOntario19 km NNE19°7°88 mm
SarniaOntario24 km W19°8°81 mm
Port HuronMichigan25 km W19°8°81 mm
CorunnaOntario27 km WSW19°8°83 mm
Lambton ShoresOntario28 km NNE18°7°86 mm
MarysvilleMichigan30 km W19°8°83 mm

The Almanac · Wyoming Month by Month

Climate normals 1991–2020 · pick a month
PrecipitationAverage highAverage low
Fair
The Almanac Speaks
May
✦✦✦✦✦

Spring takes hold here: highs climb 7° from April to about 19°, with nights near 7°. Wet spells are common — about 90 mm, the 2nd wettest month.

Climate of Wyoming by month
MonthHighLowRainWindDaylightVisit
January-1°-8°71 mm18 km/h9 h 21 min✦
February-1°-8°63 mm17 km/h10 h 28 min✦
March5°-4°57 mm16 km/h11 h 48 min✦✦
April12°2°88 mm16 km/h13 h 20 min✦✦
May19°7°90 mm14 km/h14 h 38 min✦✦✦
June24°13°90 mm11 km/h15 h 20 min✦✦✦
July27°16°73 mm11 km/h15 h 3 min✦✦✦
August26°15°73 mm10 km/h13 h 55 min✦✦✦
September23°12°94 mm12 km/h12 h 26 min✦✦✦
October16°6°90 mm15 km/h10 h 57 min✦✦✦
November8°1°80 mm17 km/h9 h 39 min✦
December2°-4°70 mm17 km/h9 h 1 min✦✦

Questions Readers Ask about Wyoming in May

Answered from the wire & the Almanac

What is the weather like in Wyoming in May?

Days average 19 °C (66 °F) and nights 7 °C (45 °F), with about 90 mm (3.5 in) of rain over the month. Spring takes hold here: highs climb 7° from April to about 19°, with nights near 7°. Wet spells are common — about 90 mm, the 2nd wettest month.

Is May a good time to visit Wyoming?

The Almanac gives May 3 of 5 (fair). The best months are September and June.

How long are the days in Wyoming in May?

In mid-May the sun is up for about 14 h 38 min. The days are lengthening — from 9 h 1 min in December to 15 h 20 min in June.

Does it snow in Wyoming in May?

Hardly — May nights average 7 °C (45 °F), above freezing.

What should I pack for Wyoming in May?

Layers, a warm coat and stout boots, plus a good raincoat — it is a wet month.

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The Editor’s Remark

“Weather is the only news that never grows stale. Each morning the sky writes its own front page, and we at Wanted Weather are but its telegraph operators.”— J. Whitmore, Editor
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