Oshawa weather in June

In June, Oshawa sees average daytime highs of 23°C and overnight lows near 14°C, with 89 mm of rain across 11 wet days and about 15.2 hours of daylight. It is the 3rd-warmest and 1st-wettest month of the year here.

Highs climb over the month, from about 21°C in the first days to 25°C by the end. The sky is clear or mostly clear about 29% of the time in June, and the air most often feels dry.

Daylight stretches from about 15 hours at the start of June to 15 h 18 min by month's end. Set against the rest of the year, June is Oshawa's 4th-clearest and 10th-windiest month. For the whole year in context, see Oshawa's year-round climate.

Daytime high
23°
3rd warmest
Overnight low
14°
10th coldest
Rainfall
89 mm
11 wet days
Daylight
15 h 18 min
4:38 AM – 7:54 PM
Cloud cover
60%
4th clearest
Wind
11 km/h
10th windiest
Solar energy
6.43 kWh/m²
Travel score
6.6
out of 10

Oshawa is city in Durham Region, Ontario, Canada.

Air quality
Good
PM2.5 6 µg/m³ · 2019
Density
1,204/km²
people per km²
Founded
1850

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

Temperature in June

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 21°C in the first days to 25°C by the end.

A typical June day in Oshawa reaches about 23°C in the afternoon and slips back to 14°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 18°C and 29°C. Set against its neighbours, June runs about 5°C warmer than May and about 3°C cooler than July.

10°20°30°151015202530
Avg high (°C)Avg low (°C)
12111
22111
32112
42212
52212
62212
72212
82212
92213
102313
112313
122313
132313
142313
152414
162414
172414
182414
192414
202414
212415
222515
232515
242515
252515
262515
272515
282515
292515
302515

How June really feels in Oshawa

Once humidity and wind are folded in, June 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

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

Oshawa weather by month

How June compares with the rest of the year at a glance. June is the 3rd-warmest and 1st-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°7310.22.79.50.8
Dec / -6°6710.66.88.80.0

Cloud cover in June

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 29% of the time in June.

Beyond those clear spells, partly cloudy skies cover about 18% of June, with mostly cloudy or overcast conditions the remaining 53%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
14258
24258
34258
44258
54357
64357
74456
84456
94456
104555
114555
124753
134753
144753
154753
164753
174951
184951
194951
204951
215050
224951
235050
245050
255149
265149
275248
285248
295248
305347

Chance of precipitation in June

Any precipitation

Oshawa gets around 89 mm of rain over 11 wet days in June, the wettest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 36% and peaks near 38% on the wettest days.

0%10%20%30%40%50%151015202530
Rain chance (%)
135
235
335
435
535
635
735
835
935
1035
1135
1236
1336
1436
1536
1636
1737
1837
1937
2037
2138
2238
2337
2437
2537
2636
2736
2836
2935
3035

Humidity in June

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, June lands in the dry band about 52% of days. Sticky, muggy-or-worse air turns up on roughly 7% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
171151130
271151130
370161130
468171230
567181230
667181230
765191330
863201340
962201440
1060211540
1158221640
1257221740
1354231850
1454231850
1552241950
1650242060
1748252160
1847252160
1945262270
2044262270
2142272380
2241272380
2340272490
2439272490
25382724101
26372724111
27372724111
28362724121
29352724131
30342724131

Wind in June

Winds average 11 km/h in June.

Across June, daily wind ranges from about 11 km/h on the calmest days to 12 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
112calm
212calm
312calm
412calm
512calm
612calm
712calm
812calm
912calm
1011calm
1111calm
1211calm
1311calm
1411calm
1511calm
1611calm
1711calm
1811calm
1911calm
2011calm
2111calm
2211calm
2311calm
2411calm
2511calm
2611calm
2711calm
2811calm
2911calm
3011calm

Sunrise & sunset in June

DaylightNight

Daylight runs from about 15 hours at the start of June to 15 h 18 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 18 minutes over June. Sunrise moves from 4:42 AM to 4:41 AM, and sunset from 7:44 PM to 7:56 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
115.04:427:44
215.04:427:45
315.14:417:45
415.14:417:46
515.14:407:47
615.14:407:48
715.24:397:48
815.24:397:49
915.24:397:50
1015.24:397:50
1115.24:387:51
1215.24:387:52
1315.24:387:52
1415.24:387:53
1515.34:387:53
1615.34:387:54
1715.34:387:54
1815.34:387:54
1915.34:387:55
2015.34:387:55
2115.34:387:55
2215.34:387:56
2315.34:387:56
2415.34:397:56
2515.34:397:56
2615.34:397:56
2715.34:407:56
2815.34:407:56
2915.34:407:56
3015.34:417:56

Solar energy in June

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in June, about 6.43 kWh/m² — the sunniest month for solar.

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 — June's 6.43 kWh/m² sits near the top of that range.

0246151015202530
Solar energy (kWh/m²)Level
16.2Intense
26.3Intense
36.3Intense
46.3Intense
56.3Intense
66.3Intense
76.3Intense
86.3Intense
96.4Intense
106.4Intense
116.4Intense
126.4Intense
136.5Intense
146.5Intense
156.5Intense
166.5Intense
176.5Intense
186.5Intense
196.5Intense
206.5Intense
216.5Intense
226.5Intense
236.5Intense
246.5Intense
256.5Intense
266.5Intense
276.5Intense
286.5Intense
296.5Intense
306.5Intense
Planning a trip in June

Is June a good time to visit Oshawa?

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

6.6
Sightseeing
2nd-best month of the year
5.3
Beach & pool
3rd-best month of the year

June is a reasonable time to visit Oshawa for sightseeing.

What to pack for Oshawa in June

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

In June, Oshawa sees daytime highs around 23°C and nights near 14°C. Pack sun protection. Worth having: light clothes and rain gear. About 11 days see rain.

sun protectionlight clothesrain gear

Sea temperature near Oshawa in June

The nearest coast averages about 14°C in June — 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 2 — about 1.2 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 Oshawa in June

LowModerateHighVery highExtreme

Clear-sky midday UV in June peaks around 8 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Oshawa 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
Location & terrain

Where is Oshawa?

Oshawa sits at 43.9°N, 78.8°W, 105 m above sea level, in Canada. The nearest listed city is Whitby, 7.0 km away.

Topography around Oshawa

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

Within 3 km, the terrain around Oshawa has only modest variations in elevation — a maximum elevation change of 85 m around an average of 111 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 346 m; within 80 km, significant variations in elevation — a maximum elevation change of 394 m.

The land around Oshawa is covered by artificial surfaces (52%) and trees (35%) within 3 km, water (31%) and trees (22%) within 16 km, and water (42%) and trees (24%) within 80 km.

3 km
85 m
16 km
346 m
80 km
394 m
treesgrasslandcroplandartificial surfacesbare terrainwater
June weather nearby: Whitby 7.0 km · Brooklin 11 km · Bowmanville 13 km · Ajax 16 km · Pickering 23 km · Rouge 28 km · West Hill 30 km · Uxbridge 31 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 Oshawa (43.9001°, -78.8496°, elevation 105 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. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).