Sarnia Weather Today · 7-Day Forecast
A Clear Night Under the Stars
A stray cloud or two drifts over the plains; the sun keeps its hold on the day.
Warmest Sunday at 14° · coldest night Sunday at 1°
The short of it: Sarnia weather on Saturday, 7 November 2026: local time, 5 °C (42 °F) with mostly clear skies, feeling like 2 °C (36 °F). Today’s high 8 °C (46 °F), low 4 °C (39 °F). No rain expected in the next 24 hours. Notices: frost possible. Source: Open-Meteo forecast models, updated 21:15 local time.
SARNIA, Saturday. — Those stepping out in Sarnia this morning will find an overcast sky; the afternoon should top out near 8°, the night near 4°. Old hands will call it a proper November day: the thirty-year average for Sarnia is 9°. Winds are light from the NNW, gusting to 17 km/h, and the glass holds steady.
Of the 3 days ahead, Sunday looks the finest at near 14°, while Sunday night will be the coldest at 1°. Not a drop is expected in that time. Nights run 3° milder than the November norm of 1°.
By the Almanac's reckoning, November in Sarnia runs from 1° at night to 9° by day, with some 72 mm of rain. July is the warmest month here at 27°, January the coldest at -8°, and June the wettest with 91 mm. Snow usually lies on the ground from December to March. The best months to ride in are July and September.
The sun is up 10 h 3 min today, and the days are shortening by about 3 minutes each. The station stands 182 m above the sea.
The Hours to Come
Temperature by the hour · rain & snow in the hour beneathThe hour-by-hour ledger
| Hour | Sky | Temp | Feels | Wind | Rain |
|---|---|---|---|---|---|
| Now | Mostly clear | 6° | 3° | 6 km/h | – |
| 10 PM | Mostly clear | 5° | 2° | 6 km/h | – |
| 11 PM | Clear sky | 4° | 1° | 4 km/h | – |
| 12 AM | Clear sky | 3° | 1° | 3 km/h | – |
| 1 AM | Clear sky | 2° | 0° | 3 km/h | – |
| 2 AM | Clear sky | 2° | -1° | 3 km/h | – |
| 3 AM | Clear sky | 2° | -1° | 3 km/h | – |
| 4 AM | Clear sky | 2° | -2° | 4 km/h | – |
| 5 AM | Clear sky | 1° | -2° | 3 km/h | – |
| 6 AM | Clear sky | 1° | -3° | 3 km/h | – |
| 7 AM | Clear sky | 1° | -2° | 3 km/h | – |
| 8 AM | Clear sky | 2° | -1° | 4 km/h | – |
| 9 AM | Clear sky | 4° | 1° | 6 km/h | – |
| 10 AM | Clear sky | 6° | 2° | 7 km/h | – |
| 11 AM | Clear sky | 9° | 5° | 8 km/h | – |
| 12 PM | Clear sky | 11° | 7° | 9 km/h | – |
| 1 PM | Clear sky | 13° | 9° | 10 km/h | – |
| 2 PM | Clear sky | 14° | 10° | 11 km/h | – |
| 3 PM | Clear sky | 14° | 10° | 11 km/h | – |
| 4 PM | Clear sky | 14° | 10° | 10 km/h | – |
| 5 PM | Clear sky | 13° | 9° | 8 km/h | – |
| 6 PM | Clear sky | 11° | 8° | 6 km/h | – |
| 7 PM | Clear sky | 9° | 6° | 5 km/h | – |
| 8 PM | Partly cloudy | 8° | 6° | 5 km/h | – |
Seven-Day Outlook · Classified
Highs in large type · pick a dayToday (Nov 7): overcast, high 8°, low 4°, dry, gusts to 22 km/h. Sun up 7:11 AM, down 5:14 PM. Cloud lies thick and low. The light is dim and the air is still.
Sunday (Nov 8): partly cloudy, high 14°, low 1°, dry, gusts to 27 km/h. Sun up 7:13 AM, down 5:12 PM. Changeable skies expected — a day for both sun hat and coat.
Monday (Nov 9): overcast, high 13°, low 4°, dry, gusts to 18 km/h. Sun up 7:14 AM, down 5:11 PM. Cloud lies thick and low. The light is dim and the air is still.