Bowmanville weather in May

In May, Bowmanville sees average daytime highs of 18°C and overnight lows near 8°C, with 76 mm of rain across 11 wet days and about 14.5 hours of daylight. It is the 5th-warmest and 7th-wettest month of the year here.

Highs climb over the month, from about 15°C in the first days to 21°C by the end. The sky is clear or mostly clear about 25% of the time in May, and the air most often feels dry.

Daylight stretches from about 13 h 54 min at the start of May to 15 hours by month's end. Set against the rest of the year, May is Bowmanville's 5th-clearest and 8th-windiest month. For the whole year in context, see Bowmanville's year-round climate.

Daytime high
18°
5th warmest
Overnight low
8th coldest
Rainfall
76 mm
11 wet days
Daylight
14 h 30 min
4:55 AM – 7:27 PM
Cloud cover
63%
5th clearest
Wind
12 km/h
8th windiest
Solar energy
6.02 kWh/m²
Travel score
5.6
out of 10

Bowmanville is population centre in Ontario, Canada.

Density
1,814/km²
people per km²

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in May

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 15°C in the first days to 21°C by the end.

A typical May day in Bowmanville reaches about 18°C in the afternoon and slips back to 8°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 12°C and 25°C. Set against its neighbours, May runs about 7°C warmer than April and about 5°C cooler than June.

10°20°30°151015202531
Avg high (°C)Avg low (°C)
1155
2156
3166
4166
5166
6166
7167
8177
9177
10177
11177
12177
13188
14188
15188
16188
17188
18198
19199
20199
21199
22199
23209
242010
252010
262010
272010
282111
292111
302111
312111

How May really feels in Bowmanville

Once humidity and wind are folded in, May averages 0 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.

Days feeling ≥ 32°C
0
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

May sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Bowmanville weather by month

How May compares with the rest of the year at a glance. May is the 5th-warmest and 7th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan-2° / -10°6510.78.89.10.0
Feb-1° / -10°518.26.710.20.0
Mar / -5°6010.45.511.60.2
Apr11° / 8311.3213.22.8
May18° / 7611014.55.6
Jun23° / 14°8911015.26.6
Jul26° / 16°8410.5014.96.6
Aug25° / 15°8010.1013.86.9
Sep21° / 11°809.1012.36.6
Oct14° / 8311.40.210.83.8
Nov / -0°7310.22.79.40.8
Dec / -6°6710.66.88.80.0

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 25% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 16% of May, with mostly cloudy or overcast conditions the remaining 59%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13961
23961
34060
44060
54060
64060
74159
84159
94159
104159
114159
124060
134060
144258
154159
164159
174159
184159
194159
204258
214159
224159
234258
244258
254357
264357
274258
284258
294258
304258
314258

Chance of precipitation in May

Any precipitation

Bowmanville gets around 76 mm of rain over 11 wet days in May. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 35% and peaks near 36% on the wettest days.

0%10%20%30%40%50%151015202531
Rain chance (%)
136
236
336
436
536
636
736
836
936
1036
1136
1236
1335
1435
1535
1635
1735
1835
1935
2035
2135
2234
2334
2434
2534
2635
2735
2835
2935
3035
3135

Humidity in May

DryComfortableHumidMuggyOppressiveMiserable

Most of May feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, May lands in the dry band about 88% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
197210
297210
396310
496310
596310
696310
795410
895410
994420
1093520
1193520
1293520
1392620
1492620
1591720
1690730
1789830
1888840
1986941
2085951
21831061
22831061
23821071
24801181
25801181
26771292
27771292
287513102
297513102
307414102
317314112

Wind in May

Winds average 12 km/h in May.

Across May, daily wind ranges from about 12 km/h on the calmest days to 13 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
113light breeze
213light breeze
313light breeze
413light breeze
513light breeze
613light breeze
712light breeze
812light breeze
912light breeze
1012light breeze
1112light breeze
1212light breeze
1312light breeze
1412light breeze
1512light breeze
1612light breeze
1712light breeze
1812light breeze
1912light breeze
2012light breeze
2112light breeze
2212light breeze
2312light breeze
2412light breeze
2512light breeze
2612calm
2712calm
2812calm
2912calm
3012calm
3112calm

Sunrise & sunset in May

DaylightNight

Daylight runs from about 13 h 54 min at the start of May to 15 hours by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 66 minutes over May. Sunrise moves from 5:14 AM to 4:42 AM, and sunset from 7:10 PM to 7:42 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.95:147:10
214.05:137:11
314.05:117:12
414.15:107:13
514.15:097:14
614.15:077:16
714.25:067:17
814.25:047:18
914.35:037:19
1014.35:027:20
1114.35:017:21
1214.44:597:23
1314.44:587:24
1414.54:577:25
1514.54:567:26
1614.54:557:27
1714.64:547:28
1814.64:537:29
1914.64:527:30
2014.74:517:32
2114.74:507:33
2214.74:497:34
2314.84:487:35
2414.84:477:36
2514.84:467:37
2614.94:457:38
2714.94:457:39
2814.94:447:40
2915.04:437:40
3015.04:437:41
3115.04:427:42

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 6.02 kWh/m².

For context, solar energy here swings from a low near 1.33 kWh/m² to a high of 6.43 kWh/m² in June across the year — May's 6.02 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
15.6Bright
25.6Bright
35.7Bright
45.7Bright
55.7Bright
65.8Bright
75.8Bright
85.8Bright
95.8Bright
105.9Bright
115.9Bright
125.9Bright
136.0Bright
146.0Bright
156.0Intense
166.0Intense
176.0Intense
186.1Intense
196.1Intense
206.1Intense
216.1Intense
226.2Intense
236.2Intense
246.2Intense
256.2Intense
266.2Intense
276.2Intense
286.2Intense
296.2Intense
306.2Intense
316.2Intense
Planning a trip in May

Is May a good time to visit Bowmanville?

Our two travel scores rate May for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

5.6
Sightseeing
5th-best month of the year
2.0
Beach & pool
5th-best month of the year

May is a reasonable time to visit Bowmanville for sightseeing.

What to pack for Bowmanville in May

From May's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In May, Bowmanville sees daytime highs around 18°C and nights near 8°C. Pack sun protection. Worth having: rain gear. About 11 days see rain.

sun protectionrain gear

Sea temperature near Bowmanville in May

The nearest coast averages about 7°C in May — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea offshore is warmest in August at about 21°C and coldest in March near 3°C.

It's comfortable for a long swim from Jul 27 to Sep 3 — about 1.3 months when the water holds above 20°C.

0°10°20°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarm
Sea temperature (°C)Comfort
Jan4Bracing
Feb3Bracing
Mar3Bracing
Apr4Bracing
May7Bracing
Jun14Bracing
Jul19Cool
Aug21Refreshing
Sep19Cool
Oct13Bracing
Nov8Bracing
Dec5Bracing

UV index in Bowmanville in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks around 6 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Bowmanville peaks around June 20 at about 8 (very high) — sunscreen and a hat are worth it in the middle of the day. It bottoms out near December 21 at about 1 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 7 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighVery highHighModerateLowJun 20UV 8Dec 21UV 1
UV index (midday)Level
Jan1Low
Feb2Low
Mar4Moderate
Apr5High
May6High
Jun8Very high
Jul7Very high
Aug6High
Sep5High
Oct3Moderate
Nov2Low
Dec1Low

Air quality in Bowmanville in May

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where May falls, not just the annual average.

Air quality in Bowmanville is worst in June — around 16 µg/m³ PM2.5 (moderate), about 2.2× the cleanest month (December, 8 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJun 1616 µg/m³Dec 108 µg/m³
PM2.5 (µg/m³)Level
Jan9Good
Feb12Good
Mar14Moderate
Apr14Moderate
May16Moderate
Jun16Moderate
Jul16Moderate
Aug14Moderate
Sep12Moderate
Oct8Good
Nov8Good
Dec8Good
Location & terrain

Where is Bowmanville?

Bowmanville sits at 43.9°N, 78.7°W, 104 m above sea level, in Canada. The nearest listed city is Oshawa, 13 km away.

Topography around Bowmanville

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Bowmanville.

Within 3 km, the terrain around Bowmanville has only modest variations in elevation — a maximum elevation change of 139 m around an average of 109 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 358 m; within 80 km, significant variations in elevation — a maximum elevation change of 394 m.

The land around Bowmanville is covered by artificial surfaces (30%), trees (28%) and cropland (24%) within 3 km, water (35%), trees (24%) and cropland (20%) within 16 km, and water (43%) and trees (26%) within 80 km.

3 km
139 m
16 km
358 m
80 km
394 m
treesgrasslandcroplandartificial surfacesbare terrainwater
May weather nearby: Oshawa 13 km · Whitby 20 km · Brooklin 23 km · Ajax 29 km · Pickering 36 km · Uxbridge 40 km · Rouge 41 km · Cobourg 42 km

Canada travel facts

Travel advisory
Level 1
Exercise Normal Precautions
Power plugs
Type A / B
120 V · 60 Hz
Prices
≈ 83% of US
price level, 2025
GDP per capita
$55,698
2025
Happiness
6.7 / 10
World Happiness, 2025
Safe drinking water
97%
of population, 2024
Homicide rate
2
per 100k, 2023
Road deaths
5.3
per 100k/yr, 2019
Income group
High
World Bank
Religion
Christian 53%none 35%Muslim 5%Hindu 2%

Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.

Data sources

Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Bowmanville (43.9168°, -78.6829°, elevation 104 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).