Weather in Sarnia — today, tomorrow and 14-day forecast
Weather in Sarnia now: +20°, clear, wind 6.8 m/s, humidity 81%. Accurate forecast for today, tomorrow, 3 days and 2 weeks — temperature, precipitation, pressure and wind.
Weather in Sarnia now
Hourly forecast for today in Sarnia
Weather in Sarnia tomorrow
From +19° to +31° — day and night.
Weather in Sarnia for 3 days
From +19° to +31° — day and night.
Weather in Sarnia for the week
Including the 5-day outlook.
From +16° to +31° — day and night.
Weather in Sarnia for 2 weeks
Including the 10-day outlook.
From +16° to +31° — day and night.
Weekend weather in Sarnia
Weather for the weather-sensitive
📒 Weather diary in Sarnia
Ready-made observation table for July: past days are already filled in with weather-station data — for school and beyond. Open the diary →
What to do in Sarnia in weather like this 🎯
✉️ Weather forecast by email
Get the forecast for this city by email — every day at 17:00 Moscow time.
The Moon today 🌙
Sarnia, Ontario, Canada. Population 72 125.
Precipitation map 🌧️
Cities near Sarnia 📍
FAQ about weather in Sarnia ❓
What's the weather in Sarnia right now?
Now +20°, clear, wind 6.8 m/s, N-W, humidity 81%. Feels like +17°.
What's the weather in Sarnia tomorrow?
Tomorrow: +31° by day, +19° at night, clear.
Sunrise and sunset in Sarnia?
Sunrise 05:18, sunset 19:55, day length 14h 37m.
What's the pressure and humidity in Sarnia?
Pressure 761 mmHg, humidity 81%, wind 7 m/s. Matters for weather-sensitive people.
Do I need an umbrella in Sarnia today?
No, precipitation is unlikely — you can go out without an umbrella.
Do I need sunscreen in Sarnia?
Yes, the UV index is 7 — high. Use SPF 30+, especially for children; no more than 20-30 minutes in direct sun unprotected.
Is it a good day for a picnic in Sarnia?
Yes, it’s warm and dry (up to +26°) — a good time for a picnic, a walk or a barbecue.
How long is it safe to stay in the sun in Sarnia?
At UV 7, no more than 20–30 minutes unprotected; longer with SPF 30+ and shade.
Is it a good day to wash the car in Sarnia?
No precipitation expected — a good time to wash the car; rain won’t spoil it in the coming hours.
Is it good weather for a walk or a bike ride in Sarnia?
Yes, dry and comfortable (up to +26°) — great for a walk, a bike ride or a run.
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Weather in Sarnia — in detail
Weather in Sarnia from “Pogoda 1” — an accurate, free forecast: current temperature, feels-like, wind, atmospheric pressure, humidity and precipitation. Available for today, tomorrow, 3, 5 and 10 days, a week, 2 weeks and a month, plus hourly weather, monthly climate, water temperature, air quality and an observation archive since 2017.
To quickly check the weather in Sarnia anytime, add the city to favorites — and get a daily forecast by email at 17:00 (Moscow time). Note: the forecast may be refined as new data arrives. Data: OpenWeather, Open-Meteo, met.no.