Oshawa weather in July

In July, Oshawa sees average daytime highs of 26°C and overnight lows near 16°C, with 84 mm of rain across 10.5 wet days and about 14.9 hours of daylight. It is the 1st-warmest and 2nd-wettest month of the year here.

Day-to-day highs hold fairly steady near 26°C through the month. The sky is clear or mostly clear about 31% of the time in July, and the air most often feels humid.

Daylight stretches from about 15 h 12 min at the start of July to 14 h 30 min by month's end. Set against the rest of the year, July is Oshawa's 2nd-clearest and 11th-windiest month. For the whole year in context, see Oshawa's year-round climate.

Daytime high
26°
1st warmest
Overnight low
16°
12th coldest
Rainfall
84 mm
10.5 wet days
Daylight
15 hours
4:52 AM – 7:50 PM
Cloud cover
56%
2nd clearest
Wind
11 km/h
11th windiest
Solar energy
6.34 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 July

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 26°C through the month.

A typical July day in Oshawa reaches about 26°C in the afternoon and slips back to 16°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 22°C and 30°C. Set against its neighbours, July runs about 3°C warmer than June and about 1°C warmer than August.

10°15°20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
12516
22516
32616
42616
52616
62616
72616
82616
92616
102616
112616
122616
132616
142616
152616
162616
172617
182617
192617
202617
212617
222617
232617
242617
252617
262617
272617
282617
292616
302616
312616

How July really feels in Oshawa

Once humidity and wind are folded in, July 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

July 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 July compares with the rest of the year at a glance. July is the 1st-warmest and 2nd-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 July

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 31% of the time in July.

Beyond those clear spells, partly cloudy skies cover about 23% of July, with mostly cloudy or overcast conditions the remaining 46%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15446
25446
35545
45545
55545
65644
75644
85644
95743
105743
115743
125644
135644
145644
155644
165545
175545
185446
195347
205248
215248
225248
235149
245050
255050
265050
275050
285050
295050
305050
315149

Chance of precipitation in July

Any precipitation

Oshawa gets around 84 mm of rain over 10.5 wet days in July. 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 37% on the wettest days.

0%10%20%30%40%50%151015202531
Rain chance (%)
134
234
333
433
532
632
731
832
932
1032
1133
1233
1334
1434
1535
1635
1735
1836
1936
2037
2137
2237
2337
2437
2537
2637
2737
2836
2936
3036
3136

Humidity in July

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, July lands in the humid band about 29% of days. Sticky, muggy-or-worse air turns up on roughly 20% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1342724142
2342724142
3332724142
4332724152
5332624152
6322624162
7322624162
8312624172
9302624182
10292625182
11282525183
12272526193
13262527193
14262428193
15252429193
16242430193
17242431193
18232431193
19222432183
20222433183
21212433184
22212533184
23202533183
24202633183
25202633173
26202733173
27192832173
28202832183
29202831182
30202931182
31202930182

Wind in July

Winds average 11 km/h in July.

Across July, 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 July

DaylightNight

Daylight runs from about 15 h 12 min at the start of July to 14 h 30 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 42 minutes over July. Sunrise moves from 4:41 AM to 5:06 AM, and sunset from 7:56 PM to 7:37 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
115.24:417:56
215.24:427:56
315.24:427:56
415.24:437:56
515.24:447:55
615.24:447:55
715.24:457:55
815.24:457:54
915.14:467:54
1015.14:477:54
1115.14:487:53
1215.14:487:53
1315.04:497:52
1415.04:507:52
1515.04:517:51
1615.04:527:50
1715.04:537:50
1814.94:537:49
1914.94:547:48
2014.94:557:47
2114.84:567:47
2214.84:577:46
2314.84:587:45
2414.74:597:44
2514.75:007:43
2614.75:017:42
2714.65:027:41
2814.65:037:40
2914.65:047:39
3014.55:057:38
3114.55:067:37

Solar energy in July

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in July, about 6.34 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 — July's 6.34 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
16.5Intense
26.5Intense
36.5Intense
46.5Intense
56.5Intense
66.5Intense
76.5Intense
86.5Intense
96.5Intense
106.5Intense
116.4Intense
126.4Intense
136.4Intense
146.4Intense
156.4Intense
166.3Intense
176.3Intense
186.3Intense
196.3Intense
206.2Intense
216.2Intense
226.2Intense
236.2Intense
246.1Intense
256.1Intense
266.1Intense
276.1Intense
286.0Intense
296.0Intense
306.0Intense
316.0Bright
Planning a trip in July

Is July a good time to visit Oshawa?

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

6.6
Sightseeing
2nd-best month of the year
6.3
Beach & pool
1st-best month of the year

July is a reasonable time to visit Oshawa for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Oshawa in July

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

In July, Oshawa sees daytime highs around 26°C and nights near 16°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 July

The nearest coast averages about 19°C in July — 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 July

LowModerateHighVery highExtreme

Clear-sky midday UV in July peaks around 7 — enough to warrant sun protection. 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
July 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).