St Thomas, Ontario, Canada Climate Change Severity

57
High
The current climate change severity in St Thomas is High, with a 14.7% worsening in the climate score compared to last 16 years. This suggests deteriorating conditions, with increasing negative impacts on weather patterns and environmental conditions.
Data: Jan. to Feb. (Historical Vs 2026) - Weather Data Only
Low
020
Moderate
40
High
60
Very High
80
Extreme
100
°C

St Thomas Weather Condition Changes (Historic Vs 2026)

2026
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
Historic
2026

Over the past 16 year(s), St Thomas temperature has changed by around +31.3%, and has experienced notable climate changes.

Sunny
Cloudy
Rainy
Snowy
Misty
Data: Jan. to Feb. (Historical Vs 2026)

Comparison of Weather Condition (Historic Vs 2026)

HistoricDays

Year 2026Days

Change

sunnySunny
20
-100%
cloudyCloudy
86
-25%
rainyRainy
214
-80.9%
snowySnowy
711
57.1%
mistyMisty
03
100%

Disclaimer: Other weather conditions not shown may affect the total day count.

Climate Change Indicators:

Over the past 16 years, St Thomas has experienced measurable shifts in key climate parameters, contributing to the current severity score of 57 (within the High severity category). This suggests worsening climate conditions from the previous years. Here’s a breakdown of the specific changes observed:

Severity Score

57/100

High

Low
020
Moderate
40
High
60
Very High
80
Extreme
100

From 2010 to 2025, St Thomas experienced significant changes:

Temperature change of

-1 °C

Variation in annual rainfall

+24.04 %

Change in average humidity

-0.1 %

PM2.5 levels surged by

+55.5 %

Heatwave changed by

-2.3 day(s)

Coldwave changed by

+4.1 day(s)

Wind speeds changed by

+1.7 km/h

These indicators show that St Thomas is experiencing a more volatile and extreme climate, reinforcing the need for urgent intervention to mitigate risks. As the severity score rises, focus must shift to adaptation and emergency preparedness.

Check how we calculate Climate Change Severity
Based on data from Jan. to Feb.

St Thomas Weather Forecast 30 Days (March - April 2026)
St Thomas, Ontario, Canada

Condition
Temperature IconTemperature
Humidity IconHumi.
Wind IconWind Speed
Mon. 16, Mar.
moderate rainModerate rain
Temperature Icon10°/-6°
Humidity Icon79%
Wind Icon46.4km/h
Tue. 17, Mar.
overcastOvercast
Temperature Icon-3°/-8°
Humidity Icon59%
Wind Icon44.3km/h
Wed. 18, Mar.
moderate or heavy snow showersModerate or heavy snow showers
Temperature Icon-1°/-5°
Humidity Icon73%
Wind Icon24.1km/h
Thu. 19, Mar.
patchy rain possiblePatchy rain nearby
Temperature Icon4°/0°
Humidity Icon91%
Wind Icon18.4km/h
Fri. 20, Mar.
overcastOvercast
Temperature Icon9°/1°
Humidity Icon88%
Wind Icon31.3km/h
Sat. 21, Mar.
partly cloudyPartly Cloudy
Temperature Icon8°/4°
Humidity Icon87%
Wind Icon15.1km/h
Sun. 22, Mar.
cloudyCloudy
Temperature Icon8°/2°
Humidity Icon87%
Wind Icon26.3km/h
Mon. 23, Mar.
light freezing rainLight freezing rain
Temperature Icon3°/-1°
Humidity Icon73%
Wind Icon25.2km/h
Tue. 24, Mar.
overcastOvercast
Temperature Icon3°/-2°
Humidity Icon57%
Wind Icon22.7km/h
Wed. 25, Mar.
sunnySunny
Temperature Icon3°/-3°
Humidity Icon58%
Wind Icon25.9km/h
Thu. 26, Mar.
overcastOvercast
Temperature Icon0°/-4°
Humidity Icon46%
Wind Icon19.8km/h
Fri. 27, Mar.
heavy snowHeavy snow
Temperature Icon4°/-2°
Humidity Icon78%
Wind Icon28.8km/h
Sat. 28, Mar.
moderate or heavy snow showersModerate or heavy snow showers
Temperature Icon2°/-2°
Humidity Icon74%
Wind Icon23.4km/h
Sun. 29, Mar.
blowing snowBlowing snow
Temperature Icon3°/-1°
Humidity Icon75%
Wind Icon28.4km/h
Mon. 30, Mar.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon8°/-1°
Humidity Icon79%
Wind Icon25.2km/h
Tue. 31, Mar.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon9°/0°
Humidity Icon81%
Wind Icon24.5km/h
Wed. 1, Apr.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon8°/-1°
Humidity Icon77%
Wind Icon23.8km/h
Thu. 2, Apr.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon8°/-1°
Humidity Icon71%
Wind Icon22.7km/h
Sun. 5, Apr.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon8°/0°
Humidity Icon79%
Wind Icon24.1km/h
Mon. 6, Apr.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon10°/0°
Humidity Icon77%
Wind Icon22.3km/h
Tue. 7, Apr.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon10°/1°
Humidity Icon76%
Wind Icon23km/h
Wed. 8, Apr.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon9°/1°
Humidity Icon78%
Wind Icon24.5km/h
Thu. 9, Apr.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon10°/1°
Humidity Icon74%
Wind Icon22.3km/h
Fri. 10, Apr.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon11°/2°
Humidity Icon77%
Wind Icon25.2km/h
Sat. 11, Apr.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon12°/2°
Humidity Icon81%
Wind Icon24.8km/h
Sun. 12, Apr.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon13°/2°
Humidity Icon76%
Wind Icon22km/h
Mon. 13, Apr.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon13°/3°
Humidity Icon74%
Wind Icon22.3km/h
Tue. 14, Apr.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon13°/3°
Humidity Icon73%
Wind Icon24.1km/h

Highest & Lowest Weather Forecasts

TemperatureTemperature

High will be onSun. 12, Apr.

13°C

Low will be onTue. 17, Mar.

-8°C

HumidityHumidity

High will be onThu. 19, Mar.

91%

Low will be onThu. 26, Mar.

46%

Wind SpeedWind Speed

High will be onMon. 16, Mar.

46.4km/h

Low will be onSat. 21, Mar.

15.1km/h

PrecipitationPrecipitation

High will be onMon. 30, Mar.

6.4mm

Low will be onTue. 24, Mar.

0.01mm

Ultraviolet IndexUV

High will be onSat. 21, Mar.

3

Low will be onWed. 18, Mar.

1

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