East Gwillimbury weather in December

In December, East Gwillimbury sees average daytime highs of 1°C and overnight lows near -7°C, with 57 mm of precipitation across 9.9 wet days and about 8.8 hours of daylight. It is the 10th-warmest and 10th-wettest month of the year here.

Highs ease over the month, from about 3°C in the first days to -1°C by the end. The sky is clear or mostly clear about 8% of the time in December, and the air most often feels dry.

Daylight stretches from about 8 h 54 min at the start of December to 8 h 42 min by month's end. Set against the rest of the year, December is East Gwillimbury's 11th-clearest and 5th-windiest month. For the whole year in context, see East Gwillimbury's year-round climate.

Daytime high
10th warmest
Overnight low
-7°
3rd coldest
Precipitation
57 mm
9.9 wet days
Daylight
8 h 42 min
7:53 AM – 4:35 PM
Cloud cover
80%
11th clearest
Wind
13 km/h
5th windiest
Solar energy
1.29 kWh/m²
Travel score
0.0
out of 10

East Gwillimbury is town in York Region, Ontario, Canada.

Density
98/km²
people per km²
Founded
1850

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

Temperature in December

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 3°C in the first days to -1°C by the end.

A typical December day in East Gwillimbury reaches about 1°C in the afternoon and slips back to -7°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between -6°C and 7°C. Set against its neighbours, December runs about 6°C cooler than November and about 3°C warmer than January.

-20°-10°10°151015202531
Avg high (°C)Avg low (°C)
13-4
23-4
33-4
42-4
52-5
62-5
72-5
82-5
91-6
101-6
111-6
121-6
131-6
141-6
151-7
160-7
170-7
180-7
190-7
200-7
210-7
220-7
230-7
240-8
250-8
26-1-8
27-1-8
28-1-8
29-1-8
30-1-8
31-1-8

How December really feels in East Gwillimbury

Once humidity and wind are folded in, December averages 0 days that feel above 32°C and 31 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
31
26 feel bitter (≤ -10°C)

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

East Gwillimbury weather by month

How December compares with the rest of the year at a glance. December is the 10th-warmest and 10th-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 December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 8% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 9% of December, with mostly cloudy or overcast conditions the remaining 83%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
12080
22080
32080
42080
52080
61981
71981
81981
91981
101981
111882
121882
131882
141783
151783
161783
171783
181783
191783
201783
211585
221585
231585
241585
251585
261585
271486
281486
291486
301486
311486

Chance of precipitation in December

Any precipitationSnow

East Gwillimbury gets around 57 mm of rain and snow over 9.9 wet days in December. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 32% and peaks near 36% on the wettest days, and about 7 days bring snow.

0%10%20%30%40%50%151015202531
Rain chance (%)Snow chance (%)
13620
23521
33521
43421
53422
63422
73323
83323
93223
103224
113224
123224
133124
143124
153124
163224
173224
183224
193224
203224
213124
223124
233124
243123
253224
263224
273224
283224
293325
303325
313326

Humidity in December

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, December lands in the dry band about 100% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)
1100
2100
3100
4100
5100
6100
7100
8100
9100
10100
11100
12100
13100
14100
15100
16100
17100
18100
19100
20100
21100
22100
23100
24100
25100
26100
27100
28100
29100
30100
31100

Wind in December

Winds average 13 km/h in December.

Across December, daily wind ranges from about 13 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
113light breeze
213light breeze
313light breeze
413light breeze
513light breeze
613light breeze
713light breeze
813light breeze
913light breeze
1013light breeze
1113light breeze
1213light breeze
1313light breeze
1413light breeze
1513light breeze
1613light breeze
1713light 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 December

DaylightNight

Daylight runs from about 8 h 54 min at the start of December to 8 h 42 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 12 minutes over December. Sunrise moves from 7:39 AM to 7:59 AM, and sunset from 4:36 PM to 4:43 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
18.97:394:36
28.97:404:35
38.97:414:35
48.97:424:35
58.97:434:35
68.87:444:35
78.87:454:34
88.87:464:34
98.87:474:34
108.87:484:34
118.87:494:34
128.77:504:34
138.77:504:35
148.77:514:35
158.77:524:35
168.77:534:35
178.77:534:35
188.77:544:36
198.77:554:36
208.77:554:36
218.77:564:37
228.77:564:37
238.77:574:38
248.77:574:38
258.77:574:39
268.77:584:40
278.77:584:40
288.77:584:41
298.77:594:41
308.77:594:42
318.77:594:43

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 1.29 kWh/m² — the year's lowest.

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 — December's 1.29 kWh/m² sits near the bottom.

00.511.52151015202531
Solar energy (kWh/m²)Level
11.4Dim
21.3Dim
31.3Dim
41.3Dim
51.3Dim
61.3Dim
71.3Dim
81.3Dim
91.3Dim
101.3Dim
111.3Dim
121.3Dim
131.3Dim
141.3Dim
151.3Dim
161.3Dim
171.3Dim
181.3Dim
191.3Dim
201.3Dim
211.3Dim
221.3Dim
231.3Dim
241.3Dim
251.3Dim
261.3Dim
271.3Dim
281.3Dim
291.3Dim
301.3Dim
311.3Dim
Planning a trip in December

Is December a good time to visit East Gwillimbury?

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

0.0
Sightseeing
10th-best month of the year
0.0
Beach & pool
8th-best month of the year

December is a weaker month for outdoor sightseeing in East Gwillimbury.

What to pack for East Gwillimbury in December

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

In December, East Gwillimbury sees daytime highs around 1°C and nights near -7°C. Pack a warm layer and a heavy coat. Worth having: rain gear. About 10 days see rain.

a warm layera heavy coatrain gear

Sea temperature near East Gwillimbury in December

The nearest coast averages about 5°C in December — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 52 km away) is warmest in August at about 21°C and coldest in March near 3°C.

It's comfortable for a long swim from Jul 27 to Sep 2 — about 1.2 months when the water holds above 20°C.

0°10°20°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarm
Sea temperature (°C)Comfort
Jan4Bracing
Feb3Bracing
Mar3Bracing
Apr4Bracing
May7Bracing
Jun14Bracing
Jul19Cool
Aug21Refreshing
Sep19Cool
Oct13Bracing
Nov8Bracing
Dec5Bracing

UV index in East Gwillimbury in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks around 1. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in East Gwillimbury 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

Air quality in East Gwillimbury in December

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where December falls, not just the annual average.

Air quality in East Gwillimbury is worst in May — around 19 µg/m³ PM2.5 (moderate), about 2.1× the cleanest month (November, 9 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodMay 2019 µg/m³Nov 239 µg/m³
PM2.5 (µg/m³)Level
Jan11Good
Feb14Moderate
Mar16Moderate
Apr17Moderate
May19Moderate
Jun18Moderate
Jul18Moderate
Aug16Moderate
Sep14Moderate
Oct10Good
Nov9Good
Dec9Good
Location & terrain

Where is East Gwillimbury?

East Gwillimbury sits at 44.1°N, 79.4°W, 271 m above sea level, in Canada. The nearest listed city is Newmarket, 6.0 km away.

Topography around East Gwillimbury

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

Within 3 km, the terrain around East Gwillimbury has only modest variations in elevation — a maximum elevation change of 80 m around an average of 265 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 156 m; within 80 km, significant variations in elevation — a maximum elevation change of 532 m.

The land around East Gwillimbury is covered by cropland (34%), trees (28%) and grassland (23%) within 3 km, trees (40%) and cropland (29%) within 16 km, and trees (35%), cropland (24%) and water (21%) within 80 km.

3 km
80 m
16 km
156 m
80 km
532 m
treesgrasslandcroplandartificial surfacesbare terrainwaterwetland
December weather nearby: Newmarket 6.0 km · Aurora 11 km · Whitchurch-Stouffville 15 km · Keswick 17 km · Stouffville 21 km · Richmond Hill 26 km · Uxbridge 26 km · Innisfil 28 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 East Gwillimbury (44.1009°, -79.4378°, elevation 271 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. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).