Ajax weather in July

In July, Ajax sees average daytime highs of 23°C and overnight lows near 19°C, with 67 mm of rain across 8.9 wet days and about 14.9 hours of daylight. It is the 2nd-warmest and 10th-wettest month of the year here.

Highs climb over the month, from about 21°C in the first days to 23°C by the end. The sky is clear or mostly clear about 37% 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 Ajax's 2nd-clearest and 12th-windiest month. For the whole year in context, see Ajax's year-round climate.

Daytime high
23°
2nd warmest
Overnight low
19°
11th coldest
Rainfall
67 mm
8.9 wet days
Daylight
15 hours
4:53 AM – 7:51 PM
Cloud cover
52%
2nd clearest
Wind
14 km/h
12th windiest
Solar energy
6.2 kWh/m²
Travel score
7.0
out of 10

Ajax is town in Durham Region, Ontario, Canada.

Density
1,786/km²
people per km²

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

Temperature in July

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 21°C in the first days to 23°C by the end.

A typical July day in Ajax reaches about 23°C in the afternoon and slips back to 19°C overnight — a 4°C spread between the day's warmth and the night's chill. On most days the high lands between 20°C and 26°C. Set against its neighbours, July runs about 5°C warmer than June and on par with August.

10°15°20°25°30°151015202531
Avg high (°C)Avg low (°C)
12117
22117
32118
42118
52118
62218
72218
82218
92218
102219
112219
122219
132219
142319
152319
162319
172319
182319
192319
202320
212320
222320
232320
242320
252320
262320
272320
282320
292320
302320
312420

How July really feels in Ajax

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.

Ajax weather by month

How July compares with the rest of the year at a glance. July is the 2nd-warmest and 10th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan-1° / -6°8612.59.79.10.0
Feb-1° / -7°6196.910.20.0
Mar / -3°7010.14.711.60.0
Apr / 96111.613.20.7
May12° / 7810.1014.53.0
Jun18° / 14°769.7015.25.7
Jul23° / 19°678.9014.97.0
Aug23° / 19°678.8013.87.2
Sep20° / 16°859.1012.36.5
Oct14° / 10°9512.10.110.83.8
Nov / 9211.42.29.51.0
Dec / -2°8712.66.88.80.0

Cloud cover in July

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 37% of the time in July.

Beyond those clear spells, partly cloudy skies cover about 24% of July, with mostly cloudy or overcast conditions the remaining 39%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15941
26040
36040
46139
56238
66238
76238
86337
96337
106337
116238
126238
136238
146238
156238
166139
176139
186139
196139
206139
216040
226040
236040
246040
255941
265941
275941
286040
296040
306040
316139

Chance of precipitation in July

Any precipitation

Ajax gets around 67 mm of rain over 8.9 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 29% and peaks near 31% on the wettest days.

0%10%20%30%40%151015202531
Rain chance (%)
130
229
329
428
528
627
727
827
927
1027
1128
1228
1328
1429
1529
1629
1729
1830
1930
2030
2131
2231
2331
2431
2531
2630
2730
2830
2930
3030
3130

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 37% of days. Sticky, muggy-or-worse air turns up on roughly 30% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1203135131
2193036141
3183036151
4182937161
5172837171
6162737182
7162737192
8152637202
9142537213
10132437223
11132337234
12122237244
13112237255
14112138265
15102038266
16102038276
1791938276
1891838287
1991838287
2091738297
2191738297
2291638307
2391638307
2491638307
2591638307
2691637317
2791637317
2891636317
2991736327
3091735327
31101834327

Wind in July

Winds average 14 km/h in July, the calmest month.

Across July, daily wind ranges from about 14 km/h on the calmest days to 15 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202531
Wind speed (km/h)Feels
114light breeze
214light breeze
314light breeze
414light breeze
514light breeze
614light breeze
714light breeze
814light breeze
914light breeze
1014light breeze
1114light breeze
1214light breeze
1314light breeze
1414light breeze
1514light breeze
1614light breeze
1714light breeze
1814light breeze
1914light breeze
2015light breeze
2115light breeze
2215light breeze
2315light breeze
2415light breeze
2515light breeze
2615light breeze
2715light breeze
2815light breeze
2915light breeze
3015light breeze
3115light breeze

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 4:42 AM to 5:07 AM, and sunset from 7:57 PM to 7:37 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
115.24:427:57
215.24:437:57
315.24:437:56
415.24:447:56
515.24:447:56
615.24:457:56
715.24:467:55
815.14:467:55
915.14:477:55
1015.14:487:54
1115.14:497:54
1215.14:497:53
1315.04:507:53
1415.04:517:52
1515.04:527:52
1615.04:537:51
1714.94:537:50
1814.94:547:50
1914.94:557:49
2014.94:567:48
2114.84:577:47
2214.84:587:46
2314.84:597:45
2414.75:007:44
2514.75:017:44
2614.75:027:43
2714.65:037:42
2814.65:047:40
2914.65:057:39
3014.55:067:38
3114.55:077:37

Solar energy in July

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in July, about 6.2 kWh/m².

For context, solar energy here swings from a low near 1.28 kWh/m² to a high of 6.32 kWh/m² in June across the year — July's 6.2 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
16.4Intense
26.4Intense
36.4Intense
46.4Intense
56.4Intense
66.4Intense
76.4Intense
86.3Intense
96.3Intense
106.3Intense
116.3Intense
126.3Intense
136.3Intense
146.2Intense
156.2Intense
166.2Intense
176.2Intense
186.2Intense
196.1Intense
206.1Intense
216.1Intense
226.0Intense
236.0Intense
246.0Intense
256.0Bright
266.0Bright
275.9Bright
285.9Bright
295.9Bright
305.9Bright
315.8Bright
Planning a trip in July

Is July a good time to visit Ajax?

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

7.0
Sightseeing
2nd-best month of the year
5.1
Beach & pool
2nd-best month of the year

July is one of the better times to visit Ajax for general sightseeing.

What to pack for Ajax in July

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

In July, Ajax sees daytime highs around 23°C and nights near 19°C. Pack sun protection. Worth having: light clothes and rain gear. About 9 days see rain.

sun protectionlight clothesrain gear

Sea temperature near Ajax 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 at the nearest coast (about 13 km away) 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 Ajax in July

LowModerateHighVery highExtreme

Clear-sky midday UV in July peaks around 8 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Ajax peaks around June 21 at about 8 (very high) — sunscreen, a hat and midday shade are essential. 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 21UV 8Dec 21UV 1
UV index (midday)Level
Jan1Low
Feb2Low
Mar4Moderate
Apr5High
May6High
Jun8Very high
Jul8Very high
Aug6High
Sep5High
Oct3Moderate
Nov2Low
Dec1Low

Air quality in Ajax in July

GoodModeratePoorUnhealthyVery unhealthy

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

Air quality in Ajax is worst in May — around 21 µg/m³ PM2.5 (moderate), about 2.2× the cleanest month (November, 10 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodMay 2021 µg/m³Nov 2310 µg/m³
PM2.5 (µg/m³)Level
Jan11Good
Feb14Moderate
Mar17Moderate
Apr18Moderate
May21Moderate
Jun20Moderate
Jul20Moderate
Aug17Moderate
Sep16Moderate
Oct11Good
Nov10Good
Dec10Good
Location & terrain

Where is Ajax?

Ajax sits at 43.9°N, 79.0°W, 97 m above sea level, in Canada. The nearest listed city is Whitby, 9.0 km away.

Topography around Ajax

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

Within 3 km, the terrain around Ajax has only modest variations in elevation — a maximum elevation change of 62 m around an average of 95 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 215 m; within 80 km, significant variations in elevation — a maximum elevation change of 484 m.

The land around Ajax is covered by artificial surfaces (53%) and trees (28%) within 3 km, water (35%) and trees (23%) within 16 km, and water (39%) and trees (24%) within 80 km.

3 km
62 m
16 km
215 m
80 km
484 m
treesgrasslandcroplandartificial surfacesbare terrainwaterwetland
July weather nearby: Whitby 9.0 km · Pickering 10 km · Rouge 12 km · Brooklin 13 km · West Hill 15 km · Morningside 16 km · Oshawa 16 km · Malvern 16 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 Ajax (43.8501°, -79.0329°, elevation 97 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).