Guelph weather in July

In July, Guelph sees average daytime highs of 26°C and overnight lows near 15°C, with 85 mm of rain across 10.9 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 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 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 Guelph's 1st-clearest and 11th-windiest month. For the whole year in context, see Guelph's year-round climate.

Daytime high
26°
1st warmest
Overnight low
15°
12th coldest
Rainfall
85 mm
10.9 wet days
Daylight
14 h 54 min
4:58 AM – 7:55 PM
Cloud cover
56%
1st clearest
Wind
11 km/h
11th windiest
Solar energy
6.07 kWh/m²
Travel score
6.7
out of 10

Guelph is city in Ontario, Canada.

Air quality
Good
PM2.5 7 µg/m³ · 2019
Density
498/km²
people per km²
Founded
1827

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 Guelph reaches about 26°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°35°151015202531
Avg high (°C)Avg low (°C)
12515
22515
32515
42515
52515
62515
72515
82515
92615
102615
112615
122615
132615
142615
152616
162616
172616
182616
192616
202616
212616
222616
232616
242616
252616
262616
272616
282516
292515
302515
312515

How July really feels in Guelph

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.

Guelph 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°6610.89.49.10.0
Feb-1° / -10°538.37.310.20.0
Mar / -5°629.75.611.60.3
Apr12° / 8711.72.513.22.9
May18° / 8811.6014.55.5
Jun23° / 13°9311.6015.26.5
Jul26° / 15°8510.9014.96.7
Aug25° / 15°769.9013.86.9
Sep21° / 10°779.6012.36.5
Oct13° / 78110.410.83.7
Nov / -1°7310.63.69.50.7
Dec / -6°6310.67.98.80.0

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 (%)
15446
25446
35545
45545
55545
65644
75644
85644
95644
105545
115545
125545
135446
145446
155446
165347
175347
185347
195347
205347
215347
225347
235347
245248
255248
265347
275446
285446
295446
305446
315545

Chance of precipitation in July

Any precipitation

Guelph gets around 85 mm of rain over 10.9 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 36% and peaks near 38% on the wettest days.

0%10%20%30%40%50%151015202531
Rain chance (%)
135
235
334
434
533
633
733
833
933
1033
1134
1234
1334
1435
1535
1635
1736
1836
1936
2037
2137
2238
2338
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 18% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1402421141
2402421151
3402421151
4402421151
5402421151
6392421151
7392421151
8382421151
9372422152
10362422162
11352423162
12342424162
13332424162
14322525163
15312525163
16302526163
17292526163
18292626163
19282627163
20272627173
21272727173
22262727173
23262827163
24262827163
25252927163
26252927162
27263026162
28263026162
29263026162
30273026162
31273025161

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
2211calm
2311calm
2411calm
2511calm
2611calm
2711calm
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 4:48 AM to 5:13 AM, and sunset from 8:00 PM to 7:41 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
115.24:488:00
215.24:498:00
315.24:498:00
415.24:508:00
515.24:508:00
615.14:518:00
715.14:527:59
815.14:527:59
915.14:537:58
1015.14:547:58
1115.14:547:58
1215.04:557:57
1315.04:567:57
1415.04:577:56
1515.04:587:55
1614.94:587:55
1714.94:597:54
1814.95:007:53
1914.95:017:53
2014.85:027:52
2114.85:037:51
2214.85:047:50
2314.75:057:49
2414.75:067:48
2514.75:077:48
2614.65:087:47
2714.65:097:46
2814.65:107:45
2914.55:117:43
3014.55:127:42
3114.55:137:41

Solar energy in July

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in July, about 6.07 kWh/m².

For context, solar energy here swings from a low near 1.31 kWh/m² to a high of 6.22 kWh/m² in June across the year — July's 6.07 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 Guelph?

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
6.2
Beach & pool
1st-best month of the year

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

What to pack for Guelph in July

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

In July, Guelph sees daytime highs around 26°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

Sea temperature near Guelph in July

The nearest coast averages about 20°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 54 km away) is warmest in August at about 21°C and coldest in February near 3°C.

It's comfortable for a long swim from Jul 22 to Sep 1 — about 1.4 months when the water holds above 20°C.

0°10°20°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarm
Sea temperature (°C)Comfort
Jan4Bracing
Feb3Bracing
Mar3Bracing
Apr4Bracing
May8Bracing
Jun15Cool
Jul20Cool
Aug21Refreshing
Sep19Cool
Oct13Bracing
Nov8Bracing
Dec5Bracing

UV index in Guelph 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 Guelph 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
Location & terrain

Where is Guelph?

Guelph sits at 43.5°N, 80.3°W, 335 m above sea level, in Canada. The nearest listed city is Hespeler, 13 km away.

Topography around Guelph

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

Within 3 km, the terrain around Guelph has only modest variations in elevation — a maximum elevation change of 73 m around an average of 331 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 143 m; within 80 km, significant variations in elevation — a maximum elevation change of 469 m.

The land around Guelph is covered by trees (42%) and artificial surfaces (42%) within 3 km, trees (38%) and cropland (38%) within 16 km, and cropland (49%) and trees (26%) within 80 km.

3 km
73 m
16 km
143 m
80 km
469 m
treesgrasslandcroplandartificial surfacesbare terrainwater
July weather nearby: Hespeler 13 km · Fiddlesticks 17 km · Fergus 20 km · Cambridge 21 km · Christopher-Champlain 22 km · Waterloo 23 km · Kitchener 25 km · Forest Heights 26 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 Guelph (43.5459°, -80.256°, elevation 335 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).