Thorold, Canada experiences average highs of 14°C (57°F) and lows of 7°C (45°F) throughout the year. Rainfall is moderate, averaging about 12 rainy days per month. Average highs have cooled by 0.8°C (1.4°F) across the available records.
Thorold, Canada Weather & Climate 2026
Monthly climate averages for Thorold, Canada. Based on 10-year ERA5 reanalysis data.
Climate Overview
Drier season: Feb–Sep 
Wetter season: Jan–Dec At-a-Glance Climate Summary
Live Weather & Air Quality
Key figures
Climate Score
5/10
Best: May, June, July, August, September
UV Index
4
Low
Temperature 14°C / 7°C
Feels Like 11°C / 4°C
Rainy Days 12
Rainfall 87 mm
Sunshine 8 h
Humidity 73%
Wind Speed 25 km/h
Dew Point 6°C
Snow Days 9 days
Frost Days 16 days
Hottest Month
27°C
July
Avg Low20°C
Rain11days
Coldest Month
-5°C
January
Avg High0°C
Rain12days
Driest Month
9days
September
Avg High22°C
Avg Low16°C
Windiest Month
30 km/h
February (Gusts 49)
Worst Time to Visit
Consider avoiding January, February, March, December due to very cold temperatures, frequent rain.
Sun Position
Sunrise 05:38
Daylight 15.4h
Sunset 20:59
Live conditions—
Thorold on the map · live conditions
Thorold, Canada
- Continent
- Americas
- Country
- Canada
- City
- Thorold
- Population
- 18.8K
- Coordinates
- 43.12°, -79.20°
Seasonal Breakdown
Spring
Mar–May
Avg High 12°C
Avg Low 4°C
Rain 12 days/mo
1/3 best months
Summer
Jun–Aug
Avg High 25°C
Avg Low 18°C
Rain 11 days/mo
3/3 best months
Autumn
Sep–Nov
Avg High 16°C
Avg Low 10°C
Rain 11 days/mo
1/3 best months
Winter
Dec–Feb
Avg High 2°C
Avg Low -4°C
Rain 12 days/mo
Climate Charts
Based on historical averages (2016–2025)
Monthly Temperatures
HighLowShaded bands show the typical range across the available yearly records.
Line chart showing monthly temperatures. Jan: 0°C / -5°C . Feb: 2°C / -5°C . Mar: 6°C / -1°C . Apr: 12°C / 4°C . May: 18°C / 10°C . Jun: 24°C / 16°C . Jul: 27°C / 20°C . Aug: 25°C / 19°C . Sep: 22°C / 16°C . Oct: 16°C / 10°C . Nov: 8°C / 3°C . Dec: 3°C / -1°C .
Monthly Rainfall
Rainfall
Bar chart showing monthly rainfall. Jan: 81 mm. Feb: 79 mm. Mar: 87 mm. Apr: 107 mm. May: 86 mm. Jun: 75 mm. Jul: 100 mm. Aug: 85 mm. Sep: 68 mm. Oct: 108 mm. Nov: 80 mm. Dec: 89 mm.
Monthly Humidity
Humidity
Line chart showing monthly humidity. Jan: 74%. Feb: 73%. Mar: 70%. Apr: 70%. May: 72%. Jun: 70%. Jul: 73%. Aug: 74%. Sep: 74%. Oct: 74%. Nov: 73%. Dec: 76%.
Monthly Wind Speed
Wind SpeedGusts
Bar chart showing monthly wind speed. Jan: 29 km/h . Feb: 30 km/h . Mar: 28 km/h . Apr: 26 km/h . May: 22 km/h . Jun: 22 km/h . Jul: 20 km/h . Aug: 20 km/h . Sep: 21 km/h . Oct: 26 km/h . Nov: 29 km/h . Dec: 30 km/h .
Sunshine
Sunshine
Sunshine: Jan: 5h. Feb: 6h. Mar: 8h. Apr: 9h. May: 11h. Jun: 12h. Jul: 12h. Aug: 11h. Sep: 10h. Oct: 7h. Nov: 6h. Dec: 4h.
UV Index
UV Index
Bar chart showing monthly UV index. Jan: UV 2. Feb: UV 3. Mar: UV 4. Apr: UV 5. May: UV 6. Jun: UV 7. Jul: UV 7. Aug: UV 6. Sep: UV 5. Oct: UV 3. Nov: UV 2. Dec: UV 2.
Monthly Daylight Hours
Daylight12h reference
Monthly Dew Point & Comfort
Dew Point Dry Comfortable Humid Muggy Oppressive
Snow Days
Snow DaysSnowfall
Snow Days: Jan: 14 days. Feb: 12 days. Mar: 8 days. Apr: 4 days. May: 0 days. Jun: 0 days. Jul: 0 days. Aug: 0 days. Sep: 0 days. Oct: 0 days. Nov: 4 days. Dec: 12 days.
Climate Trends
Average highs have cooled by 0.8°C (1.4°F) across the available records. Average rainfall has remained broadly steady.
2016 to 2025
Avg high Avg rainfall
Climate summary
| Last 12 months | All years | |
|---|---|---|
| Hottest month | Jul 2025 · 28°C | Jul · 27°C |
| Coldest month | Feb 2025 · -7°C | Jan · -5°C |
| Wettest month | May 2025 · 130 mm | Oct · 108 mm |
| Windiest month | Dec 2025 · 34 km/h | Feb · 30 km/h |
Month-by-Month Weather Table
January
Poor 
February
Poor March
Poor April
Poor May best
Good June best
Excellent July best
Excellent August best
Excellent September best
Excellent October
Good November
Poor December
Poor | Month | Temp | Feels Like | Rain | Sun | Humidity | UV | Status | Details |
|---|---|---|---|---|---|---|---|---|
| January | 0°C / -5°C | -5°C / -11°C | 12days (81 mm) Wet | 4.7h Fair | 74% Muggy | 1.8 Low | Poor | View Details |
| February | 2°C / -5°C | -4°C / -11°C | 11days (79 mm) Wet | 6.2h Fair | 73% Muggy | 3 Moderate | Poor | View Details |
| March | 6°C / -1°C | 2°C / -7°C | 11days (87 mm) Wet | 7.7h Good | 70% Muggy | 4.1 Moderate | Poor | View Details |
| April | 12°C / 4°C | 8°C / -1°C | 14days (107 mm) Wet | 8.9h Good | 70% Muggy | 5 Moderate | Poor | View Details |
| May best | 18°C / 10°C | 17°C / 7°C | 11days (86 mm) Wet | 10.5h Excellent | 72% Muggy | 6.2 High | Good | View Details |
| June best | 24°C / 16°C | 24°C / 15°C | 10days (75 mm) Wet | 12.1h Excellent | 70% Muggy | 6.7 High | Excellent | View Details |
| July best | 27°C / 20°C | 28°C / 21°C | 11days (100 mm) Wet | 12h Excellent | 73% Muggy | 6.9 High | Excellent | View Details |
| August best | 25°C / 19°C | 27°C / 20°C | 11days (85 mm) Wet | 11.3h Excellent | 74% Muggy | 6.1 High | Excellent | View Details |
| September best | 22°C / 16°C | 22°C / 15°C | 9days (68 mm) Wet | 9.7h Good | 74% Muggy | 5.1 High | Excellent | View Details |
| October | 16°C / 10°C | 13°C / 7°C | 13days (108 mm) Wet | 7h Good | 74% Muggy | 3.4 Moderate | Good | View Details |
| November | 8°C / 3°C | 4°C / -2°C | 12days (80 mm) Wet | 5.5h Fair | 73% Muggy | 2.2 Moderate | Poor | View Details |
| December | 3°C / -1°C | -2°C / -7°C | 14days (89 mm) Wet | 4.2h Fair | 76% Humid | 1.6 Low | Poor | View Details |
Compare Nearby City Climates
Frequently Asked Questions
The best months to visit Thorold are May, June, July, August, September, when temperatures are comfortable and rainfall is at its lowest. This is based on 10-year climate averages for Thorold, scoring temperature, rainfall, humidity, and sunshine hours.
The hottest month in Thorold is July, with average daytime highs of 27°C (80°F). Plan outdoor activities for early morning or late afternoon if visiting during this period.
The coldest month in Thorold is January, with average overnight lows of -5°C (23°F). Pack warm layers and expect shorter daylight hours during this period.
The wettest month in Thorold is October, averaging 108mm of precipitation across 13 rainy days. An umbrella or waterproof jacket is essential.
The rainy season in Thorold runs through April, December, October, January, with the heaviest rainfall in April. Based on 10-year averages for Thorold.
Thorold receives approximately 100 sunshine hours per year. The sunniest month is June with around 12 hours. Based on climate data for Thorold.
The least favorable months to visit Thorold are January, February, March, December, primarily due to very cold temperatures, frequent rain. For the best conditions, consider May, June, July, August, September instead.
The annual average UV index in Thorold is 4, classified as moderate. Standard sun protection (sunscreen, hat) is recommended during prolonged outdoor exposure.
Average humidity in Thorold is 73%, classified as moderate. Humidity levels are generally comfortable and should not affect outdoor activities for most people.
Yes, Thorold receives snow. Months with snowfall average 9 snow days and 15 cm (6 in) of accumulation, with about 16 frost days during winter.
Average wind speeds in Thorold are 25 km/h (16 mph). The windiest month is February with peak winds reaching 30 km/h (19 mph) (gusts up to 49 km/h / 30 mph).
Thorold averages 3 clear-sky days per month with overall cloud cover around 63%. The clearest skies occur in September.
The annual average dew point in Thorold is 6°C (43°F), which feels dry and comfortable. Outdoor activities are comfortable year-round from a humidity standpoint.
Thorold has a Humid Subtropical climate, classified as Cfa under the Köppen system. Temperate climates have mild winters and warm summers, with rainfall spread across the year and four distinct seasons.
The 'feels like' temperature in Thorold ranges from 4°C (39°F) to 11°C (52°F) on average. Wind chill makes winters feel noticeably colder than the actual temperature — layered clothing is recommended.
Yes, June is a great time to visit Thorold. It earns a climate score of 8.9/10 with Excellent.
For June in Thorold, pack Umbrella, Waterproof jacket, Sunscreen (SPF 30+), Sunglasses, Comfortable walking shoes. With average highs of 24°C (74°F) and 10 rainy days, these essentials will keep you comfortable.
Data Source
Climate data derived from ERA5 reanalysis (ECMWF), averaged over 2016–2025. Sea surface temperature from marine reanalysis data. Climate scores and seasonal estimates are computed by WorldStats.
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