Waterloo weather in July

In July, Waterloo sees average daytime highs of 25°C and overnight lows near 15°C, with 85 mm of rain across 11 wet days and about 14.9 hours of daylight. It is the 1st-warmest and 4th-wettest month of the year here.

Day-to-day highs hold fairly steady near 25°C through the month. The sky is clear or mostly clear about 31% of the time in July, and the air most often feels dry.

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 Waterloo's 1st-clearest and 11th-windiest month. For the whole year in context, see Waterloo's year-round climate.

Daytime high
25°
1st warmest
Overnight low
15°
12th coldest
Rainfall
85 mm
11 wet days
Daylight
14 h 54 min
5:00 AM – 7:56 PM
Cloud cover
55%
1st clearest
Wind
11 km/h
11th windiest
Solar energy
6.08 kWh/m²
Travel score
6.7
out of 10

Waterloo is city in Ontario, Canada.

Founded
1857

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 25°C through the month.

A typical July day in Waterloo reaches about 25°C in the afternoon and slips back to 15°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 21°C and 30°C. Set against its neighbours, July runs about 2°C warmer than June and about 1°C warmer than August.

10°15°20°25°30°151015202531
Avg high (°C)Avg low (°C)
12515
22515
32515
42515
52515
62515
72515
82515
92515
102515
112515
122515
132515
142515
152515
162515
172515
182515
192515
202515
212515
222515
232515
242515
252515
262515
272515
282515
292515
302515
312515

How July really feels in Waterloo

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.

Waterloo weather by month

How July compares with the rest of the year at a glance. July is the 1st-warmest and 4th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan-2° / -10°6811.610.79.10.0
Feb-1° / -10°549.1810.20.0
Mar / -5°6310611.60.3
Apr12° / 8611.82.613.22.8
May18° / 8811.6014.55.5
Jun23° / 13°9411.4015.26.6
Jul25° / 15°8511014.96.7
Aug24° / 14°769.9013.87.0
Sep20° / 10°799.6012.36.4
Oct13° / 8011.30.410.83.6
Nov / -1°7411.24.39.50.6
Dec / -6°6511.49.38.80.0

Cloud cover in July

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 31% of the time in July, the clearest month of the year.

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 (%)
15347
25347
35446
45545
55545
65545
75545
85545
95644
105644
115545
125545
135545
145446
155446
165446
175347
185347
195347
205347
215347
225248
235248
245248
255248
265347
275347
285446
295446
305446
315446

Chance of precipitation in July

Any precipitation

Waterloo gets around 85 mm of rain over 11 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 36% and peaks near 38% on the wettest days.

0%10%20%30%40%50%151015202531
Rain chance (%)
136
236
335
435
534
634
734
833
933
1033
1134
1234
1334
1434
1534
1635
1735
1835
1936
2036
2137
2237
2337
2438
2538
2638
2738
2838
2937
3037
3137

Humidity in July

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, July lands in the dry band about 32% of days. Sticky, muggy-or-worse air turns up on roughly 17% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1412421141
2402421141
3402420141
4402420141
5402520141
6392520141
7392521141
8382521152
9372422152
10362422152
11352423152
12342523152
13332524153
14322524153
15322525153
16312625153
17302625163
18292626163
19282726163
20282726163
21272826163
22272826163
23262926163
24263025163
25263025163
26263125162
27263125152
28263125152
29273125152
30273125152
31283125151

Wind in July

Winds average 11 km/h in July.

Across July, daily wind ranges from about 10 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
2210calm
2310calm
2410calm
2510calm
2610calm
2710calm
2810calm
2910calm
3010calm
3110calm

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 4:50 AM to 5:14 AM, and sunset from 8:01 PM to 7:42 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
115.24:508:01
215.24:508:01
315.24:518:01
415.24:518:01
515.14:528:01
615.14:528:00
715.14:538:00
815.14:548:00
915.14:547:59
1015.14:557:59
1115.04:567:58
1215.04:577:58
1315.04:577:57
1415.04:587:57
1515.04:597:56
1614.95:007:56
1714.95:017:55
1814.95:017:54
1914.95:027:53
2014.85:037:53
2114.85:047:52
2214.85:057:51
2314.75:067:50
2414.75:077:49
2514.75:087:48
2614.65:097:47
2714.65:107:46
2814.65:117:45
2914.55:127:44
3014.55:137:43
3114.55:147:42

Solar energy in July

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in July, about 6.08 kWh/m².

For context, solar energy here swings from a low near 1.29 kWh/m² to a high of 6.24 kWh/m² in June across the year — July's 6.08 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
16.3Intense
26.3Intense
36.3Intense
46.3Intense
56.3Intense
66.3Intense
76.3Intense
86.2Intense
96.2Intense
106.2Intense
116.2Intense
126.2Intense
136.1Intense
146.1Intense
156.1Intense
166.1Intense
176.0Intense
186.0Intense
196.0Bright
206.0Bright
215.9Bright
225.9Bright
235.9Bright
245.9Bright
255.8Bright
265.8Bright
275.8Bright
285.8Bright
295.7Bright
305.7Bright
315.7Bright
Planning a trip in July

Is July a good time to visit Waterloo?

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

6.7
Sightseeing
2nd-best month of the year
6.1
Beach & pool
1st-best month of the year

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

What to pack for Waterloo in July

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

In July, Waterloo sees daytime highs around 25°C and nights near 15°C. Pack sun protection. Worth having: light clothes and rain gear. About 11 days see rain.

sun protectionlight clothesrain gear

UV index in Waterloo in July

LowModerateHighVery highExtreme

Clear-sky midday UV in July 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 Waterloo peaks around June 22 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near January 11 at about 1 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 8 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighVery highHighModerateLowJun 22UV 9Jan 11UV 1
UV index (midday)Level
Jan1Low
Feb2Low
Mar4Moderate
Apr5High
May6High
Jun9Very high
Jul8Very high
Aug7High
Sep5High
Oct3Moderate
Nov2Low
Dec1Low

Air quality in Waterloo 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 Waterloo is worst in July — around 16 µg/m³ PM2.5 (moderate), about 2.0× the cleanest month (November, 8 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1515 µg/m³Nov 218 µg/m³
PM2.5 (µg/m³)Level
Jan9Good
Feb11Good
Mar13Moderate
Apr13Moderate
May14Moderate
Jun15Moderate
Jul16Moderate
Aug14Moderate
Sep13Moderate
Oct8Good
Nov8Good
Dec8Good
Location & terrain

Where is Waterloo?

Waterloo sits at 43.5°N, 80.5°W, 325 m above sea level, in Canada. The nearest listed city is Kitchener, 5.0 km away.

Topography around Waterloo

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

Within 3 km, the terrain around Waterloo has only modest variations in elevation — a maximum elevation change of 71 m around an average of 336 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 176 m; within 80 km, significant variations in elevation — a maximum elevation change of 462 m.

The land around Waterloo is covered by artificial surfaces (52%) and trees (38%) within 3 km, cropland (45%) and trees (27%) within 16 km, and cropland (58%) and trees (25%) within 80 km.

3 km
71 m
16 km
176 m
80 km
462 m
treesgrasslandcroplandartificial surfacesbare terrainwater
July weather nearby: Kitchener 5.0 km · Forest Heights 5.0 km · Hespeler 17 km · Fiddlesticks 20 km · Cambridge 20 km · Christopher-Champlain 22 km · Guelph 23 km · Fergus 29 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 Waterloo (43.4668°, -80.5164°, elevation 325 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).