Newmarket weather in October

In October, Newmarket sees average daytime highs of 14°C and overnight lows near 4°C, with 75 mm of precipitation across 11 wet days and about 10.8 hours of daylight. It is the 6th-warmest and 6th-wettest month of the year here.

Highs ease over the month, from about 17°C in the first days to 10°C by the end. The sky is clear or mostly clear about 20% of the time in October, and the air most often feels dry.

Daylight stretches from about 11 h 30 min at the start of October to 10 hours by month's end. Set against the rest of the year, October is Newmarket's 7th-clearest and 7th-windiest month. For the whole year in context, see Newmarket's year-round climate.

Daytime high
14°
6th warmest
Overnight low
7th coldest
Precipitation
75 mm
11 wet days
Daylight
10 h 48 min
6:40 AM – 5:26 PM
Cloud cover
67%
7th clearest
Wind
12 km/h
7th windiest
Solar energy
2.63 kWh/m²
Travel score
3.8
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 October

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 17°C in the first days to 10°C by the end.

A typical October day in Newmarket reaches about 14°C in the afternoon and slips back to 4°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 7°C and 20°C. Set against its neighbours, October runs about 7°C cooler than September and about 7°C warmer than November.

10°20°151015202531
Avg high (°C)Avg low (°C)
1177
2177
3177
4177
5166
6166
7166
8166
9166
10155
11155
12155
13145
14145
15145
16144
17134
18134
19134
20124
21124
22123
23123
24113
25113
26113
27112
28112
29102
30102
31102

How October really feels in Newmarket

Once humidity and wind are folded in, October averages 0 days that feel above 32°C and 9 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
9
wind chill below the day's low

The story in October is cold — wind chill drags the overnight "feels like" below the raw low.

Newmarket weather by month

How October compares with the rest of the year at a glance. October is the 6th-warmest and 6th-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 October

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 20% of the time in October.

Beyond those clear spells, partly cloudy skies cover about 16% of October, with mostly cloudy or overcast conditions the remaining 64%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14357
24357
34258
44258
54258
64159
74159
84159
94159
104159
113961
123961
133961
143862
153763
163664
173565
183466
193367
203268
213268
223169
233169
243169
253070
263070
272971
282971
293070
303169
313070

Chance of precipitation in October

Any precipitationSnow

Newmarket gets around 75 mm of rain and snow over 11 wet days in October. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 35% and peaks near 37% on the wettest days, and about 0 day brings snow.

0%10%20%30%40%50%151015202531
Rain chance (%)Snow chance (%)
1350
2350
3350
4350
5340
6340
7340
8340
9340
10340
11340
12340
13340
14341
15341
16351
17351
18361
19361
20362
21372
22372
23372
24373
25373
26373
27373
28374
29374
30364
31364

Humidity in October

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, October lands in the dry band about 93% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)
182126
283116
384115
485105
586104
68794
78893
88983
98983
109172
119172
129172
139262
149361
159451
169451
179451
189541
199640
209640
219640
229730
239730
249730
259820
269820
279820
289820
299910
309910
319910

Wind in October

Winds average 12 km/h in October.

Across October, daily wind ranges from about 12 km/h on the calmest days to 13 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
112calm
212calm
312calm
412calm
512calm
612calm
712calm
812calm
912light breeze
1012light breeze
1112light breeze
1212light breeze
1312light breeze
1412light breeze
1512light breeze
1612light breeze
1712light breeze
1813light breeze
1913light breeze
2013light breeze
2113light breeze
2213light breeze
2313light breeze
2413light breeze
2513light breeze
2613light breeze
2713light breeze
2813light breeze
2913light breeze
3013light breeze
3113light breeze

Sunrise & sunset in October

DaylightNight

Daylight runs from about 11 h 30 min at the start of October to 10 hours by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 90 minutes over October. Sunrise moves from 6:21 AM to 7:00 AM, and sunset from 5:52 PM to 5:03 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.56:215:52
211.56:225:51
311.46:245:49
411.46:255:47
511.36:265:45
611.36:275:43
711.26:295:41
811.26:305:40
911.16:315:38
1011.16:325:36
1111.06:345:34
1211.06:355:32
1310.96:365:31
1410.96:385:29
1510.86:395:27
1610.86:405:26
1710.76:415:24
1810.76:435:22
1910.66:445:21
2010.66:455:19
2110.56:475:17
2210.56:485:16
2310.46:495:14
2410.46:515:13
2510.36:525:11
2610.36:535:10
2710.26:555:08
2810.26:565:07
2910.16:575:06
3010.16:595:04
3110.07:005:03

Solar energy in October

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in October, about 2.63 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 — October's 2.63 kWh/m² falls in the middle.

01234151015202531
Solar energy (kWh/m²)Level
13.4Moderate
23.3Moderate
33.3Moderate
43.2Moderate
53.2Moderate
63.1Moderate
73.1Moderate
83.0Moderate
93.0Moderate
102.9Moderate
112.9Moderate
122.8Moderate
132.8Moderate
142.7Moderate
152.7Moderate
162.6Moderate
172.6Moderate
182.5Moderate
192.5Moderate
202.4Moderate
212.4Moderate
222.3Moderate
232.3Moderate
242.3Moderate
252.2Moderate
262.2Moderate
272.2Moderate
282.1Moderate
292.1Moderate
302.1Moderate
312.1Moderate
Planning a trip in October

Is October a good time to visit Newmarket?

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

3.8
Sightseeing
6th-best month of the year
0.3
Beach & pool
6th-best month of the year

October is a weaker month for outdoor sightseeing in Newmarket.

What to pack for Newmarket in October

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

In October, Newmarket sees daytime highs around 14°C and nights near 4°C. Worth packing: a warm layer and rain gear. About 11 days see rain.

a warm layerrain gear

Sea temperature near Newmarket in October

The nearest coast averages about 13°C in October — 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 October

LowModerateHighVery highExtreme

Clear-sky midday UV in October peaks around 3 — 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
October 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).