Newmarket weather in August

In August, Newmarket sees average daytime highs of 25°C and overnight lows near 14°C, with 78 mm of rain across 9.6 wet days and about 13.8 hours of daylight. It is the 2nd-warmest and 4th-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 30% of the time in August, and the air most often feels dry.

Daylight stretches from about 14 h 30 min at the start of August to 13 h 06 min by month's end. Set against the rest of the year, August is Newmarket's 2nd-clearest and 12th-windiest month. For the whole year in context, see Newmarket's year-round climate.

Daytime high
25°
2nd warmest
Overnight low
14°
11th coldest
Rainfall
78 mm
9.6 wet days
Daylight
13 h 48 min
5:27 AM – 7:17 PM
Cloud cover
57%
2nd clearest
Wind
10 km/h
12th windiest
Solar energy
5.34 kWh/m²
Travel score
6.9
out of 10

Newmarket is town in York Region, Ontario, Canada.

Air quality
Good
PM2.5 6 µg/m³ · 2019
Density
2,368/km²
people per km²
Founded
1801

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 Newmarket reaches about 25°C in the afternoon and slips back to 14°C overnight — a 11°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°20°30°151015202531
Avg high (°C)Avg low (°C)
12615
22615
32615
42615
52615
62615
72615
82615
92615
102515
112515
122515
132515
142515
152514
162514
172514
182514
192514
202514
212514
222514
232514
242514
252514
262414
272414
282413
292413
302413
312413

How August really feels in Newmarket

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.

Newmarket weather by month

How August compares with the rest of the year at a glance. August is the 2nd-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° / -11°5710.18.89.10.0
Feb-1° / -11°467.96.810.20.0
Mar / -5°5610.15.811.60.3
Apr12° / 7711.42.313.23.0
May19° / 8011.2014.55.8
Jun24° / 13°8811.2015.26.6
Jul26° / 15°8410.80156.6
Aug25° / 14°789.6013.86.9
Sep21° / 10°739.2012.36.6
Oct14° / 75110.410.83.8
Nov / -1°6810.23.49.40.7
Dec / -7°579.97.38.80.0

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 30% of the time in August.

Beyond those clear spells, partly cloudy skies cover about 23% of August, with mostly cloudy or overcast conditions the remaining 47%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15248
25248
35248
45248
55347
65347
75248
85248
95347
105347
115347
125347
135347
145347
155347
165347
175347
185446
195446
205446
215446
225446
235446
245446
255347
265347
275347
285347
295347
305446
315446

Chance of precipitation in August

Any precipitation

Newmarket gets around 78 mm of rain over 9.6 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 31% and peaks near 36% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%40%50%151015202531
Rain chance (%)
136
235
335
435
535
635
734
834
934
1033
1133
1232
1332
1432
1531
1631
1730
1830
1930
2029
2129
2228
2328
2428
2528
2628
2728
2828
2928
3028
3129

Humidity in August

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, August lands in the dry band about 32% of days. Sticky, muggy-or-worse air turns up on roughly 14% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1253227151
2263126151
3263126151
4273126151
5273026161
6283026161
7292926161
8292926161
9302826151
10312825151
11312825151
12322825151
13322826141
14322826141
15322826131
16322826131
17332826131
18332826121
19332926121
20332925121
21332925121
22342925121
23342925121
24352924111
25362924111
26362923111
27372823111
28382822111
29392821111
30402820111
31412820111

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 30 min at the start of August to 13 h 06 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 5:10 AM to 5:44 AM, and sunset from 7:38 PM to 6:51 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.55:107:38
214.45:117:37
314.45:127:36
414.45:137:34
514.35:147:33
614.35:157:32
714.25:167:31
814.25:177:29
914.25:197:28
1014.15:207:26
1114.15:217:25
1214.05:227:23
1314.05:237:22
1413.95:247:20
1513.95:267:19
1613.85:277:17
1713.85:287:16
1813.75:297:14
1913.75:307:12
2013.75:317:11
2113.65:337:09
2213.65:347:07
2313.55:357:06
2413.55:367:04
2513.45:377:02
2613.45:387:00
2713.35:406:59
2813.35:416:57
2913.25:426:55
3013.25:436:53
3113.15:446:51

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 5.34 kWh/m².

For context, solar energy here swings from a low near 1.29 kWh/m² to a high of 6.32 kWh/m² in June across the year — August's 5.34 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.8Bright
25.8Bright
35.8Bright
45.7Bright
55.7Bright
65.7Bright
75.6Bright
85.6Bright
95.6Bright
105.5Bright
115.5Bright
125.5Bright
135.4Bright
145.4Bright
155.4Bright
165.3Bright
175.3Bright
185.3Bright
195.3Bright
205.2Bright
215.2Bright
225.2Bright
235.1Bright
245.1Bright
255.0Bright
265.0Bright
275.0Bright
284.9Bright
294.9Bright
304.8Bright
314.8Bright
Planning a trip in August

Is August a good time to visit Newmarket?

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

6.9
Sightseeing
1st-best month of the year
6.2
Beach & pool
2nd-best month of the year

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

What to pack for Newmarket in August

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

In August, Newmarket sees daytime highs around 25°C and nights near 14°C. Worth packing: light clothes, rain gear and sun protection. About 10 days see rain.

light clothesrain gearsun protection

Sea temperature near Newmarket in August

The nearest coast averages about 21°C in August — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 48 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 20 to Sep 2 — about 1.5 months when the water holds above 20°C.

0°10°20°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarm
Sea temperature (°C)Comfort
Jan4Bracing
Feb3Bracing
Mar3Bracing
Apr4Bracing
May7Bracing
Jun15Bracing
Jul20Cool
Aug21Refreshing
Sep19Cool
Oct13Bracing
Nov8Bracing
Dec5Bracing

UV index in Newmarket in August

LowModerateHighVery highExtreme

Clear-sky midday UV in August peaks around 6 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Newmarket peaks around June 22 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 8 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighVery highHighModerateLowJun 22UV 8Dec 21UV 1
UV index (midday)Level
Jan1Low
Feb2Low
Mar4Moderate
Apr5High
May6High
Jun8Very high
Jul8Very high
Aug6High
Sep5High
Oct3Moderate
Nov2Low
Dec1Low
Location & terrain

Where is Newmarket?

Newmarket sits at 44.1°N, 79.5°W, 250 m above sea level, in Canada. The nearest listed city is Aurora, 6.0 km away.

Topography around Newmarket

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

Within 3 km, the terrain around Newmarket has only modest variations in elevation — a maximum elevation change of 95 m around an average of 263 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 170 m; within 80 km, significant variations in elevation — a maximum elevation change of 532 m.

The land around Newmarket is covered by artificial surfaces (44%) and trees (37%) within 3 km, trees (40%), cropland (28%) and grassland (21%) within 16 km, and trees (33%), cropland (25%) and water (22%) within 80 km.

3 km
95 m
16 km
170 m
80 km
532 m
treesgrasslandcroplandartificial surfacesbare terrainwaterwetland
August weather nearby: Aurora 6.0 km · East Gwillimbury 6.0 km · Whitchurch-Stouffville 13 km · Stouffville 20 km · Richmond Hill 20 km · Keswick 22 km · Vaughan 24 km · Markham 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 Newmarket (44.0501°, -79.4663°, elevation 250 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).