Newmarket in Summer
In summer (June, July and August), Newmarket sees average daytime highs around 25°C and overnight lows near 14°C, with 249 mm of rain over about 32 wet days across the season. It is the warmest season of the year and the wettest season of the year.
Over the season highs climb from about 22°C in early June to 24°C by late August. The sky is clear or mostly clear about 29% of the time across summer, and the air most often feels dry.
Summer is Newmarket's best season of the year to visit on our travel score. For the whole year in context, see Newmarket's year-round climate.
- Avg daytime high
- 25°C
- warmest season of the year
- Avg overnight low
- 14°C
- Rainfall
- 249 mm
- 32 wet days
- Avg wind
- 10 km/h
- Travel score
- 6.7
- best season of the year
- Months
- Jun · Jul · Aug
Temperature in Newmarket in Summer
Over the season highs climb from about 22°C in early June to 24°C by late August.
A typical summer day in Newmarket reaches about 25°C and drops to 14°C overnight. The warmest of the three months is July, the coolest June.
How summer really feels in Newmarket
Once humidity and wind are folded in, summer brings about 0 days that feel above 32°C and 0 that feel at or below 0°C.
summer 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 the three summer months (June, July and August) compare with the rest of the year — the season's months are highlighted.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Snow days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|---|
| Jan | -2° / -11° | 57 | 10.1 | 8.8 | 9.1 | 0.0 |
| Feb | -1° / -11° | 46 | 7.9 | 6.8 | 10.2 | 0.0 |
| Mar | 5° / -5° | 56 | 10.1 | 5.8 | 11.6 | 0.3 |
| Apr | 12° / 2° | 77 | 11.4 | 2.3 | 13.2 | 3.0 |
| May | 19° / 7° | 80 | 11.2 | 0 | 14.5 | 5.8 |
| Jun | 24° / 13° | 88 | 11.2 | 0 | 15.2 | 6.6 |
| Jul | 26° / 15° | 84 | 10.8 | 0 | 15 | 6.6 |
| Aug | 25° / 14° | 78 | 9.6 | 0 | 13.8 | 6.9 |
| Sep | 21° / 10° | 73 | 9.2 | 0 | 12.3 | 6.6 |
| Oct | 14° / 4° | 75 | 11 | 0.4 | 10.8 | 3.8 |
| Nov | 6° / -1° | 68 | 10.2 | 3.4 | 9.4 | 0.7 |
| Dec | 1° / -7° | 57 | 9.9 | 7.3 | 8.8 | 0.0 |
Cloud cover in Summer
The sky is clear or mostly clear about 29% of the time across summer.
Chance of precipitation in Summer
Newmarket gets around 249 mm of rain over 32 wet days across summer. The line is the day-by-day chance of measurable precipitation.
Humidity in Summer
Most of summer feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Summer
Winds average 10 km/h across summer.
Sunrise & sunset in Summer
Daylight runs from about 15 hours in early June to 13 h 06 min by late August. The lit band spans sunrise to sunset each day.
Solar energy in Summer
Average shortwave solar energy reaching the ground each day across summer, about 6.0 kWh/m².
Is summer a good time to visit Newmarket?
Our two travel scores rate summer for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
summer 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 Summer
From summer's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In summer, Newmarket sees daytime highs around 25°C and nights near 14°C. Pack sun protection. Worth having: light clothes and rain gear. About 32 days see rain.
Sea temperature near Newmarket in Summer
The nearest coast averages about 19°C across summer — 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.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 4 | 3 | 3 | 4 | 7 | 15 | 20 | 21 | 19 | 13 | 8 | 5 |
| Comfort | Bracing | Bracing | Bracing | Bracing | Bracing | Bracing | Cool | Refreshing | Cool | Bracing | Bracing | Bracing |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 4 | Bracing |
| Feb | 3 | Bracing |
| Mar | 3 | Bracing |
| Apr | 4 | Bracing |
| May | 7 | Bracing |
| Jun | 15 | Bracing |
| Jul | 20 | Cool |
| Aug | 21 | Refreshing |
| Sep | 19 | Cool |
| Oct | 13 | Bracing |
| Nov | 8 | Bracing |
| Dec | 5 | Bracing |
UV index in Newmarket in Summer
Clear-sky midday UV across summer averages 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 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.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 1 | 2 | 4 | 5 | 6 | 8 | 8 | 6 | 5 | 3 | 2 | 1 |
| Level | Low | Low | Moderate | High | High | Very high | Very high | High | High | Moderate | Low | Low |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 1 | Low |
| Feb | 2 | Low |
| Mar | 4 | Moderate |
| Apr | 5 | High |
| May | 6 | High |
| Jun | 8 | Very high |
| Jul | 8 | Very high |
| Aug | 6 | High |
| Sep | 5 | High |
| Oct | 3 | Moderate |
| Nov | 2 | Low |
| Dec | 1 | Low |
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.
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
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.