Stittsville weather in May

In May, Stittsville sees average daytime highs of 19°C and overnight lows near 8°C, with 83 mm of precipitation across 11.3 wet days and about 14.6 hours of daylight. It is the 5th-warmest and 7th-wettest month of the year here.

Highs climb over the month, from about 16°C in the first days to 21°C by the end. The sky is clear or mostly clear about 22% of the time in May, and the air most often feels dry.

Daylight stretches from about 14 hours at the start of May to 15 h 12 min by month's end. Set against the rest of the year, May is Stittsville's 5th-clearest and 8th-windiest month. For the whole year in context, see Stittsville's year-round climate.

Daytime high
19°
5th warmest
Overnight low
8th coldest
Precipitation
83 mm
11.3 wet days
Daylight
14 h 42 min
4:40 AM – 7:20 PM
Cloud cover
66%
5th clearest
Wind
11 km/h
8th windiest
Solar energy
5.62 kWh/m²
Travel score
5.7
out of 10

Stittsville is neighbourhood in Ottawa, Ontario, Canada.

Density
5,283/km²
people per km²
Founded
1854

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 16°C in the first days to 21°C by the end.

A typical May day in Stittsville reaches about 19°C in the afternoon and slips back to 8°C overnight — a 11°C spread between the day's warmth and the night's chill. On most days the high lands between 12°C and 26°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)
1165
2165
3165
4175
5175
6176
7176
8176
9186
10186
11187
12187
13187
14197
15197
16197
17198
18198
19208
20208
21209
22209
23209
24209
25219
262110
272110
282110
292110
302110
312110

How May really feels in Stittsville

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.

Stittsville 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-5° / -14°6810.298.90.0
Feb-3° / -13°548.67.910.10.0
Mar / -7°69106.311.60.1
Apr12° / 8911.5313.22.8
May19° / 8311.30.214.65.7
Jun24° / 13°9411.5015.46.5
Jul26° / 15°9411.9015.16.3
Aug25° / 14°8410.7013.96.7
Sep21° / 10°8710.1012.36.4
Oct13° / 9411.50.610.73.4
Nov / -2°78113.69.30.5
Dec-1° / -9°73118.58.60.0

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 22% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 14% of May, with mostly cloudy or overcast conditions the remaining 63%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13565
23565
33664
43664
53664
63763
73763
83763
93763
103862
113961
123862
133862
143862
153862
163862
173763
183862
193862
203862
213763
223763
233763
243763
253664
263664
273664
283565
293565
303565
313466

Chance of precipitation in May

Any precipitationSnow

Stittsville gets around 83 mm of rain and snow over 11.3 wet days in May. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 36% and peaks near 39% on the wettest days, and about 0 day brings snow.

0%10%20%30%40%50%151015202531
Rain chance (%)Snow chance (%)
1362
2362
3362
4362
5361
6361
7361
8361
9361
10361
11361
12361
13351
14351
15351
16351
17351
18360
19360
20360
21360
22360
23370
24370
25370
26380
27380
28380
29390
30390
31390

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 89% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
197300
297300
396400
496400
596400
695410
794510
894510
994510
1094510
1194510
1294510
1394510
1493520
1592620
1692620
1792620
1890631
1988741
2088741
2187751
2285861
2384961
2482972
25801082
26801082
27781192
28771292
29771292
307513102
317314103

Wind in May

Winds average 11 km/h in May.

Across May, daily wind ranges from about 11 km/h on the calmest days to 11 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
111calm
211calm
311calm
411calm
511calm
611calm
711calm
811calm
911calm
1011calm
1111calm
1211calm
1311calm
1411calm
1511calm
1611calm
1711calm
1811calm
1911calm
2011calm
2111calm
2211calm
2311calm
2411calm
2511calm
2611calm
2711calm
2811calm
2911calm
3011calm
3111calm

Sunrise & sunset in May

DaylightNight

Daylight runs from about 14 hours at the start of May to 15 h 12 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 72 minutes over May. Sunrise moves from 5:00 AM to 4:26 AM, and sunset from 7:01 PM to 7:36 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.05:007:01
214.14:597:03
314.14:577:04
414.24:567:05
514.24:547:06
614.24:537:08
714.34:517:09
814.34:507:10
914.44:497:11
1014.44:477:13
1114.54:467:14
1214.54:457:15
1314.54:447:16
1414.64:427:18
1514.64:417:19
1614.74:407:20
1714.74:397:21
1814.74:387:22
1914.84:377:23
2014.84:367:24
2114.94:357:26
2214.94:347:27
2314.94:337:28
2415.04:327:29
2515.04:317:30
2615.04:307:31
2715.04:297:32
2815.14:287:33
2915.14:287:34
3015.14:277:35
3115.24:267:36

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 5.62 kWh/m².

For context, solar energy here swings from a low near 1.21 kWh/m² to a high of 6.01 kWh/m² in June across the year — May's 5.62 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
15.3Bright
25.3Bright
35.3Bright
45.4Bright
55.4Bright
65.4Bright
75.4Bright
85.5Bright
95.5Bright
105.5Bright
115.5Bright
125.6Bright
135.6Bright
145.6Bright
155.6Bright
165.7Bright
175.7Bright
185.7Bright
195.7Bright
205.7Bright
215.7Bright
225.7Bright
235.7Bright
245.8Bright
255.8Bright
265.8Bright
275.8Bright
285.8Bright
295.8Bright
305.8Bright
315.8Bright
Planning a trip in May

Is May a good time to visit Stittsville?

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

5.7
Sightseeing
5th-best month of the year
2.4
Beach & pool
5th-best month of the year

May is a reasonable time to visit Stittsville for sightseeing.

What to pack for Stittsville in May

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

In May, Stittsville sees daytime highs around 19°C and nights near 8°C. Worth packing: a warm layer, rain gear and sun protection. About 11 days see rain.

a warm layerrain gearsun protection

UV index in Stittsville 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 Stittsville peaks around July 13 at about 8 (very high) — sunscreen and a hat are worth it in the middle of the day. It bottoms out near January 1 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 highHighModerateLowJul 13UV 8Jan 1UV 1
UV index (midday)Level
Jan1Low
Feb2Low
Mar3Moderate
Apr4Moderate
May6High
Jun7High
Jul8Very high
Aug5High
Sep5High
Oct3Moderate
Nov2Low
Dec1Low

Air quality in Stittsville 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 Stittsville is worst in June — around 15 µg/m³ PM2.5 (moderate), about 2.3× the cleanest month (December, 7 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodModerateGoodJun 2015 µg/m³Dec 107 µg/m³
PM2.5 (µg/m³)Level
Jan8Good
Feb11Good
Mar13Moderate
Apr11Good
May13Moderate
Jun15Moderate
Jul14Moderate
Aug13Moderate
Sep10Good
Oct7Good
Nov7Good
Dec7Good
Location & terrain

Where is Stittsville?

Stittsville sits at 45.3°N, 75.9°W, 123 m above sea level, in Canada. The nearest listed city is Kanata, 6.0 km away.

Topography around Stittsville

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

Within 3 km, the terrain around Stittsville has only modest variations in elevation — a maximum elevation change of 47 m around an average of 119 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 123 m; within 80 km, significant variations in elevation — a maximum elevation change of 519 m.

The land around Stittsville is covered by trees (49%) and artificial surfaces (20%) within 3 km, trees (43%) and cropland (24%) within 16 km, and trees (63%) and cropland (20%) within 80 km.

3 km
47 m
16 km
123 m
80 km
519 m
treesgrasslandcroplandartificial surfacesbare terrainwaterwetland
May weather nearby: Kanata 6.0 km · Bridlewood 6.0 km · Nepean 18 km · Aylmer 19 km · Ottawa South 24 km · Ottawa 25 km · Gloucester 25 km · Centretown 25 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 Stittsville (45.2501°, -75.9161°, elevation 123 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. 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).