Saint-Lazare weather in August

In August, Saint-Lazare sees average daytime highs of 25°C and overnight lows near 15°C, with 98 mm of rain across 11.2 wet days and about 13.9 hours of daylight. It is the 2nd-warmest and 6th-wettest month of the year here.

Highs ease over the month, from about 26°C in the first days to 24°C by the end. The sky is clear or mostly clear about 29% of the time in August, and the air most often feels humid.

Daylight stretches from about 14 h 36 min at the start of August to 13 h 12 min by month's end. Set against the rest of the year, August is Saint-Lazare's 2nd-clearest and 12th-windiest month. For the whole year in context, see Saint-Lazare's year-round climate.

Daytime high
25°
2nd warmest
Overnight low
15°
11th coldest
Rainfall
98 mm
11.2 wet days
Daylight
13 h 54 min
5:03 AM – 6:59 PM
Cloud cover
59%
2nd clearest
Wind
10 km/h
12th windiest
Solar energy
5.13 kWh/m²
Travel score
6.7
out of 10

Saint-Lazare is city in Montérégue, Quebec, Canada.

Density
295/km²
people per km²
Founded
1875

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

Temperature in August

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 26°C in the first days to 24°C by the end.

A typical August day in Saint-Lazare 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 29°C. Set against its neighbours, August runs about 1°C cooler than July and about 4°C warmer than September.

10°15°20°25°30°151015202531
Avg high (°C)Avg low (°C)
12616
22616
32616
42616
52616
62616
72515
82515
92515
102515
112515
122515
132515
142515
152515
162515
172515
182515
192514
202514
212414
222414
232414
242414
252414
262414
272414
282413
292413
302313
312313

How August really feels in Saint-Lazare

Once humidity and wind are folded in, August 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

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

Saint-Lazare weather by month

How August compares with the rest of the year at a glance. August is the 2nd-warmest and 6th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan-5° / -14°7710.69.48.90.0
Feb-4° / -13°6298.310.10.0
Mar / -7°7510.4711.60.1
Apr11° / 10511.42.913.22.6
May19° / 10011.50.214.75.7
Jun24° / 13°10511.7015.46.4
Jul26° / 16°10012.5015.16.3
Aug25° / 15°9811.2013.96.7
Sep20° / 10°9610.2012.36.3
Oct13° / 10911.60.610.73.4
Nov / -2°8811.43.89.30.4
Dec-2° / -9°8611.69.18.60.0

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

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

Beyond those clear spells, partly cloudy skies cover about 21% of August, with mostly cloudy or overcast conditions the remaining 50%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15050
25050
35050
44951
54951
64852
74852
84852
94852
104852
114852
124852
134852
144951
154951
164951
174951
185050
195050
205050
215149
225149
235149
245149
255149
265149
275149
285149
295149
305149
315149

Chance of precipitation in August

Any precipitation

Saint-Lazare gets around 98 mm of rain over 11.2 wet days in August. 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 40% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%40%50%151015202531
Rain chance (%)
140
240
340
440
540
639
739
839
939
1039
1138
1238
1338
1437
1537
1637
1736
1836
1935
2034
2133
2233
2332
2432
2532
2631
2731
2831
2931
3031
3131

Humidity in August

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, August lands in the humid band about 30% of days. Sticky, muggy-or-worse air turns up on roughly 15% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1202436191
2202536191
3202536191
4202536181
5202536181
6202635181
7212635171
8212635171
9222634171
10222734171
11232733161
12242732161
13252732151
14252732151
15262731141
16272731141
17282731131
18292730131
19302729121
20312729121
21322728121
22332727111
23352726111
24362725111
25372724111
26382723111
27392723111
28402722111
29412721111
30422720111
31432619101

Wind in August

Winds average 10 km/h in August, the calmest month.

Across August, daily wind ranges from about 10 km/h on the calmest days to 10 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
110calm
210calm
310calm
410calm
510calm
610calm
710calm
810calm
910calm
1010calm
1110calm
1210calm
1310calm
1410calm
1510calm
1610calm
1710calm
1810calm
1910calm
2010calm
2110calm
2210calm
2310calm
2410calm
2510calm
2610calm
2710calm
2810calm
2910calm
3010calm
3110calm

Sunrise & sunset in August

DaylightNight

Daylight runs from about 14 h 36 min at the start of August to 13 h 12 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 84 minutes over August. Sunrise moves from 4:45 AM to 5:21 AM, and sunset from 7:21 PM to 6:32 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.64:457:21
214.64:467:19
314.54:477:18
414.54:487:17
514.44:497:15
614.44:507:14
714.34:527:13
814.34:537:11
914.34:547:10
1014.24:557:08
1114.24:577:07
1214.14:587:05
1314.14:597:03
1414.05:007:02
1514.05:017:00
1613.95:036:59
1713.95:046:57
1813.85:056:55
1913.85:066:54
2013.75:086:52
2113.75:096:50
2213.65:106:48
2313.65:116:47
2413.55:136:45
2513.55:146:43
2613.45:156:41
2713.45:166:39
2813.35:186:37
2913.35:196:36
3013.25:206:34
3113.25:216:32

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 5.13 kWh/m².

For context, solar energy here swings from a low near 1.22 kWh/m² to a high of 5.97 kWh/m² in June across the year — August's 5.13 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.6Bright
25.5Bright
35.5Bright
45.5Bright
55.5Bright
65.4Bright
75.4Bright
85.4Bright
95.3Bright
105.3Bright
115.3Bright
125.3Bright
135.2Bright
145.2Bright
155.2Bright
165.2Bright
175.1Bright
185.1Bright
195.1Bright
205.0Bright
215.0Bright
225.0Bright
234.9Bright
244.9Bright
254.9Bright
264.8Bright
274.8Bright
284.8Bright
294.7Bright
304.7Bright
314.6Bright
Planning a trip in August

Is August a good time to visit Saint-Lazare?

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

6.7
Sightseeing
1st-best month of the year
5.9
Beach & pool
2nd-best month of the year

August is a reasonable time to visit Saint-Lazare for sightseeing.

What to pack for Saint-Lazare in August

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

In August, Saint-Lazare sees daytime highs around 25°C and nights near 15°C. Worth packing: light clothes, rain gear and sun protection. About 11 days see rain.

light clothesrain gearsun protection

UV index in Saint-Lazare in August

LowModerateHighVery highExtreme

Clear-sky midday UV in August peaks around 4 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Saint-Lazare peaks around July 13 at about 8 (very high) — sunscreen and a hat are worth it in the middle of the day. It bottoms out near January 10 at about 1 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 7 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighModerateLowJul 13UV 8Jan 10UV 1
UV index (midday)Level
Jan1Low
Feb2Low
Mar4Moderate
Apr4Moderate
May6High
Jun6High
Jul8Very high
Aug4Moderate
Sep5High
Oct3Moderate
Nov2Low
Dec1Low
Location & terrain

Where is Saint-Lazare?

Saint-Lazare sits at 45.4°N, 74.1°W, 56 m above sea level, in Canada. The nearest listed city is Vaudreuil-Dorion, 8.0 km away.

Topography around Saint-Lazare

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

Within 3 km, the terrain around Saint-Lazare has only modest variations in elevation — a maximum elevation change of 77 m around an average of 67 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 257 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,210 m.

The land around Saint-Lazare is covered by trees (64%) within 3 km, trees (34%) and cropland (32%) within 16 km, and trees (52%) and cropland (31%) within 80 km.

3 km
77 m
16 km
257 m
80 km
1,210 m
treesgrasslandcroplandartificial surfaceswater
August weather nearby: Vaudreuil-Dorion 8.0 km · Les Coteaux 15 km · Salaberry-de-Valleyfield 17 km · Pierrefonds 20 km · Beaconsfield 21 km · L'Île-Bizard–Sainte-Geneviève 21 km · Kirkland 22 km · Deux-Montagnes 23 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 Saint-Lazare (45.4001°, -74.1326°, elevation 56 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. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).