Sarnia weather in April
In April, Sarnia sees average daytime highs of 11°C and overnight lows near 3°C, with 85 mm of precipitation across 11.4 wet days and about 13.1 hours of daylight. It is the 7th-warmest and 2nd-wettest month of the year here.
Highs climb over the month, from about 8°C in the first days to 14°C by the end. The sky is clear or mostly clear about 22% of the time in April, and the air most often feels dry.
Daylight stretches from about 12 h 24 min at the start of April to 13 h 48 min by month's end. Set against the rest of the year, April is Sarnia's 7th-clearest and 5th-windiest month. For the whole year in context, see Sarnia's year-round climate.
- Daytime high
- 11°
- 7th warmest
- Overnight low
- 3°
- 6th coldest
- Precipitation
- 85 mm
- 11.4 wet days
- Daylight
- 13 h 12 min
- 5:55 AM – 7:05 PM
- Cloud cover
- 67%
- 7th clearest
- Wind
- 15 km/h
- 5th windiest
- Solar energy
- 4.95 kWh/m²
- Travel score
- 2.7
- out of 10
Sarnia is city in Ontario, Canada.
- Air quality
- Good
- PM2.5 7 µg/m³ · 2019
- Density
- 440/km²
- people per km²
- Founded
- 1830
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Temperature in April
Highs climb over the month, from about 8°C in the first days to 14°C by the end.
A typical April day in Sarnia reaches about 11°C in the afternoon and slips back to 3°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 4°C and 19°C. Set against its neighbours, April runs about 7°C warmer than March and about 7°C cooler than May.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 8 | 8 | 8 | 9 | 9 | 9 | 9 | 10 | 10 | 10 | 10 | 11 | 11 | 11 | 11 | 12 | 12 | 12 | 12 | 12 | 13 | 13 | 13 | 13 | 13 | 14 | 14 | 14 | 14 | 14 |
| Avg low (°C) | 1 | 1 | 1 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 3 | 3 | 3 | 3 | 3 | 4 | 4 | 4 | 4 | 4 | 5 | 5 | 5 | 5 | 5 | 6 | 6 | 6 | 6 | 6 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 8 | 1 |
| 2 | 8 | 1 |
| 3 | 8 | 1 |
| 4 | 9 | 1 |
| 5 | 9 | 1 |
| 6 | 9 | 2 |
| 7 | 9 | 2 |
| 8 | 10 | 2 |
| 9 | 10 | 2 |
| 10 | 10 | 2 |
| 11 | 10 | 3 |
| 12 | 11 | 3 |
| 13 | 11 | 3 |
| 14 | 11 | 3 |
| 15 | 11 | 3 |
| 16 | 12 | 4 |
| 17 | 12 | 4 |
| 18 | 12 | 4 |
| 19 | 12 | 4 |
| 20 | 12 | 4 |
| 21 | 13 | 5 |
| 22 | 13 | 5 |
| 23 | 13 | 5 |
| 24 | 13 | 5 |
| 25 | 13 | 5 |
| 26 | 14 | 6 |
| 27 | 14 | 6 |
| 28 | 14 | 6 |
| 29 | 14 | 6 |
| 30 | 14 | 6 |
How April really feels in Sarnia
Once humidity and wind are folded in, April averages 0 days that feel above 32°C and 15 that feel at or below 0°C — the comfort signal a plain temperature reading hides.
The story in April is cold — wind chill drags the overnight "feels like" below the raw low.
Sarnia weather by month
How April compares with the rest of the year at a glance. April is the 7th-warmest and 2nd-wettest month here — the current month is highlighted below.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Snow days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|---|
| Jan | -1° / -7° | 57 | 9.6 | 7.3 | 9.2 | 0.0 |
| Feb | 0° / -7° | 51 | 8.4 | 6.3 | 10.2 | 0.0 |
| Mar | 5° / -3° | 57 | 9.6 | 4.6 | 11.6 | 0.3 |
| Apr | 11° / 3° | 85 | 11.4 | 1.8 | 13.1 | 2.7 |
| May | 18° / 10° | 85 | 12 | 0 | 14.4 | 5.4 |
| Jun | 24° / 16° | 87 | 10.8 | 0 | 15.1 | 6.7 |
| Jul | 26° / 18° | 71 | 11 | 0 | 14.8 | 6.6 |
| Aug | 25° / 18° | 70 | 10.4 | 0 | 13.8 | 6.9 |
| Sep | 21° / 14° | 73 | 9.1 | 0 | 12.3 | 6.7 |
| Oct | 15° / 8° | 77 | 10.8 | 0.1 | 10.8 | 4.3 |
| Nov | 8° / 2° | 66 | 9.7 | 2.4 | 9.5 | 1.2 |
| Dec | 2° / -3° | 56 | 9.4 | 5.6 | 8.9 | 0.0 |
Cloud cover in April
The sky is clear or mostly clear about 22% of the time in April.
Beyond those clear spells, partly cloudy skies cover about 14% of April, with mostly cloudy or overcast conditions the remaining 65%.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 32 | 32 | 32 | 33 | 33 | 33 | 34 | 34 | 34 | 34 | 35 | 35 | 35 | 35 | 37 | 37 | 37 | 37 | 38 | 37 | 37 | 37 | 37 | 37 | 37 | 36 | 36 | 36 | 37 | 37 |
| Cloudier (%) | 68 | 68 | 68 | 67 | 67 | 67 | 66 | 66 | 66 | 66 | 65 | 65 | 65 | 65 | 63 | 63 | 63 | 63 | 62 | 63 | 63 | 63 | 63 | 63 | 63 | 64 | 64 | 64 | 63 | 63 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 32 | 68 |
| 2 | 32 | 68 |
| 3 | 32 | 68 |
| 4 | 33 | 67 |
| 5 | 33 | 67 |
| 6 | 33 | 67 |
| 7 | 34 | 66 |
| 8 | 34 | 66 |
| 9 | 34 | 66 |
| 10 | 34 | 66 |
| 11 | 35 | 65 |
| 12 | 35 | 65 |
| 13 | 35 | 65 |
| 14 | 35 | 65 |
| 15 | 37 | 63 |
| 16 | 37 | 63 |
| 17 | 37 | 63 |
| 18 | 37 | 63 |
| 19 | 38 | 62 |
| 20 | 37 | 63 |
| 21 | 37 | 63 |
| 22 | 37 | 63 |
| 23 | 37 | 63 |
| 24 | 37 | 63 |
| 25 | 37 | 63 |
| 26 | 36 | 64 |
| 27 | 36 | 64 |
| 28 | 36 | 64 |
| 29 | 37 | 63 |
| 30 | 37 | 63 |
Chance of precipitation in April
Sarnia gets around 85 mm of rain and snow over 11.4 wet days in April. The line is the day-by-day chance of measurable precipitation.
Day to day, the chance of measurable precipitation averages around 38% and peaks near 39% on the wettest days, and about 2 days bring snow.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain chance (%) | 36 | 36 | 37 | 37 | 37 | 38 | 38 | 37 | 37 | 37 | 37 | 37 | 37 | 37 | 37 | 37 | 37 | 37 | 37 | 38 | 38 | 38 | 38 | 39 | 39 | 39 | 39 | 39 | 39 | 39 |
| Snow chance (%) | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 9 | 9 | 8 | 8 | 7 | 6 | 6 | 5 | 5 | 4 | 4 | 3 | 3 | 3 | 2 | 2 | 2 | 1 | 1 | 1 | 1 | 1 |
| Rain chance (%) | Snow chance (%) | |
|---|---|---|
| 1 | 36 | 10 |
| 2 | 36 | 10 |
| 3 | 37 | 10 |
| 4 | 37 | 10 |
| 5 | 37 | 10 |
| 6 | 38 | 10 |
| 7 | 38 | 10 |
| 8 | 37 | 10 |
| 9 | 37 | 9 |
| 10 | 37 | 9 |
| 11 | 37 | 8 |
| 12 | 37 | 8 |
| 13 | 37 | 7 |
| 14 | 37 | 6 |
| 15 | 37 | 6 |
| 16 | 37 | 5 |
| 17 | 37 | 5 |
| 18 | 37 | 4 |
| 19 | 37 | 4 |
| 20 | 38 | 3 |
| 21 | 38 | 3 |
| 22 | 38 | 3 |
| 23 | 38 | 2 |
| 24 | 39 | 2 |
| 25 | 39 | 2 |
| 26 | 39 | 1 |
| 27 | 39 | 1 |
| 28 | 39 | 1 |
| 29 | 39 | 1 |
| 30 | 39 | 1 |
Humidity in April
Most of April feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, April lands in the dry band about 98% of days. It rarely turns muggy — the humid and sticky bands barely register.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dry (%) | 100 | 100 | 100 | 100 | 100 | 100 | 99 | 99 | 99 | 99 | 99 | 99 | 98 | 98 | 98 | 98 | 98 | 98 | 98 | 98 | 98 | 98 | 97 | 97 | 97 | 97 | 97 | 97 | 97 | 95 |
| Comfortable (%) | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 4 |
| Humid (%) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 |
| Dry (%) | Comfortable (%) | Humid (%) | |
|---|---|---|---|
| 1 | 100 | 0 | 0 |
| 2 | 100 | 0 | 0 |
| 3 | 100 | 0 | 0 |
| 4 | 100 | 0 | 0 |
| 5 | 100 | 0 | 0 |
| 6 | 100 | 0 | 0 |
| 7 | 99 | 1 | 0 |
| 8 | 99 | 1 | 0 |
| 9 | 99 | 1 | 0 |
| 10 | 99 | 1 | 0 |
| 11 | 99 | 1 | 0 |
| 12 | 99 | 1 | 0 |
| 13 | 98 | 2 | 0 |
| 14 | 98 | 2 | 0 |
| 15 | 98 | 2 | 0 |
| 16 | 98 | 2 | 0 |
| 17 | 98 | 2 | 0 |
| 18 | 98 | 2 | 0 |
| 19 | 98 | 2 | 0 |
| 20 | 98 | 2 | 0 |
| 21 | 98 | 2 | 0 |
| 22 | 98 | 2 | 0 |
| 23 | 97 | 3 | 0 |
| 24 | 97 | 3 | 0 |
| 25 | 97 | 3 | 0 |
| 26 | 97 | 3 | 0 |
| 27 | 97 | 3 | 0 |
| 28 | 97 | 3 | 0 |
| 29 | 97 | 3 | 0 |
| 30 | 95 | 4 | 1 |
Wind in April
Winds average 15 km/h in April.
Across April, daily wind ranges from about 14 km/h on the calmest days to 15 km/h at its breeziest. It stays fairly steady from day to day.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wind speed (km/h) | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 14 | 14 |
| Feels | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze |
| Wind speed (km/h) | Feels | |
|---|---|---|
| 1 | 15 | light breeze |
| 2 | 15 | light breeze |
| 3 | 15 | light breeze |
| 4 | 15 | light breeze |
| 5 | 15 | light breeze |
| 6 | 15 | light breeze |
| 7 | 15 | light breeze |
| 8 | 15 | light breeze |
| 9 | 15 | light breeze |
| 10 | 15 | light breeze |
| 11 | 15 | light breeze |
| 12 | 15 | light breeze |
| 13 | 15 | light breeze |
| 14 | 15 | light breeze |
| 15 | 15 | light breeze |
| 16 | 15 | light breeze |
| 17 | 15 | light breeze |
| 18 | 15 | light breeze |
| 19 | 15 | light breeze |
| 20 | 15 | light breeze |
| 21 | 15 | light breeze |
| 22 | 15 | light breeze |
| 23 | 15 | light breeze |
| 24 | 15 | light breeze |
| 25 | 15 | light breeze |
| 26 | 15 | light breeze |
| 27 | 15 | light breeze |
| 28 | 15 | light breeze |
| 29 | 14 | light breeze |
| 30 | 14 | light breeze |
Sunrise & sunset in April
Daylight runs from about 12 h 24 min at the start of April to 13 h 48 min by month's end. The lit band spans sunrise to sunset each day.
Days grow by about 84 minutes over April. Sunrise moves from 6:21 AM to 5:32 AM, and sunset from 6:47 PM to 7:21 PM.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight (h) | 12.4 | 12.5 | 12.5 | 12.6 | 12.6 | 12.7 | 12.7 | 12.8 | 12.8 | 12.9 | 12.9 | 13.0 | 13.0 | 13.1 | 13.1 | 13.2 | 13.2 | 13.3 | 13.3 | 13.4 | 13.4 | 13.5 | 13.5 | 13.5 | 13.6 | 13.6 | 13.7 | 13.7 | 13.8 | 13.8 |
| Sunrise (AM) | 6:21 | 6:19 | 6:18 | 6:16 | 6:14 | 6:12 | 6:10 | 6:09 | 6:07 | 6:05 | 6:03 | 6:02 | 6:00 | 5:58 | 5:56 | 5:55 | 5:53 | 5:51 | 5:50 | 5:48 | 5:46 | 5:45 | 5:43 | 5:42 | 5:40 | 5:38 | 5:37 | 5:35 | 5:34 | 5:32 |
| Sunset (PM) | 6:47 | 6:49 | 6:50 | 6:51 | 6:52 | 6:53 | 6:54 | 6:56 | 6:57 | 6:58 | 6:59 | 7:00 | 7:01 | 7:03 | 7:04 | 7:05 | 7:06 | 7:07 | 7:09 | 7:10 | 7:11 | 7:12 | 7:13 | 7:14 | 7:16 | 7:17 | 7:18 | 7:19 | 7:20 | 7:21 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 12.4 | 6:21 | 6:47 |
| 2 | 12.5 | 6:19 | 6:49 |
| 3 | 12.5 | 6:18 | 6:50 |
| 4 | 12.6 | 6:16 | 6:51 |
| 5 | 12.6 | 6:14 | 6:52 |
| 6 | 12.7 | 6:12 | 6:53 |
| 7 | 12.7 | 6:10 | 6:54 |
| 8 | 12.8 | 6:09 | 6:56 |
| 9 | 12.8 | 6:07 | 6:57 |
| 10 | 12.9 | 6:05 | 6:58 |
| 11 | 12.9 | 6:03 | 6:59 |
| 12 | 13.0 | 6:02 | 7:00 |
| 13 | 13.0 | 6:00 | 7:01 |
| 14 | 13.1 | 5:58 | 7:03 |
| 15 | 13.1 | 5:56 | 7:04 |
| 16 | 13.2 | 5:55 | 7:05 |
| 17 | 13.2 | 5:53 | 7:06 |
| 18 | 13.3 | 5:51 | 7:07 |
| 19 | 13.3 | 5:50 | 7:09 |
| 20 | 13.4 | 5:48 | 7:10 |
| 21 | 13.4 | 5:46 | 7:11 |
| 22 | 13.5 | 5:45 | 7:12 |
| 23 | 13.5 | 5:43 | 7:13 |
| 24 | 13.5 | 5:42 | 7:14 |
| 25 | 13.6 | 5:40 | 7:16 |
| 26 | 13.6 | 5:38 | 7:17 |
| 27 | 13.7 | 5:37 | 7:18 |
| 28 | 13.7 | 5:35 | 7:19 |
| 29 | 13.8 | 5:34 | 7:20 |
| 30 | 13.8 | 5:32 | 7:21 |
Solar energy in April
Average shortwave solar energy reaching the ground each day in April, about 4.95 kWh/m².
For context, solar energy here swings from a low near 1.36 kWh/m² to a high of 6.37 kWh/m² in June across the year — April's 4.95 kWh/m² falls in the middle.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 4.4 | 4.5 | 4.5 | 4.5 | 4.5 | 4.6 | 4.6 | 4.7 | 4.7 | 4.7 | 4.8 | 4.8 | 4.8 | 4.9 | 4.9 | 5.0 | 5.0 | 5.0 | 5.1 | 5.1 | 5.2 | 5.2 | 5.2 | 5.3 | 5.3 | 5.3 | 5.4 | 5.4 | 5.4 | 5.4 |
| Level | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| 1 | 4.4 | Bright |
| 2 | 4.5 | Bright |
| 3 | 4.5 | Bright |
| 4 | 4.5 | Bright |
| 5 | 4.5 | Bright |
| 6 | 4.6 | Bright |
| 7 | 4.6 | Bright |
| 8 | 4.7 | Bright |
| 9 | 4.7 | Bright |
| 10 | 4.7 | Bright |
| 11 | 4.8 | Bright |
| 12 | 4.8 | Bright |
| 13 | 4.8 | Bright |
| 14 | 4.9 | Bright |
| 15 | 4.9 | Bright |
| 16 | 5.0 | Bright |
| 17 | 5.0 | Bright |
| 18 | 5.0 | Bright |
| 19 | 5.1 | Bright |
| 20 | 5.1 | Bright |
| 21 | 5.2 | Bright |
| 22 | 5.2 | Bright |
| 23 | 5.2 | Bright |
| 24 | 5.3 | Bright |
| 25 | 5.3 | Bright |
| 26 | 5.3 | Bright |
| 27 | 5.4 | Bright |
| 28 | 5.4 | Bright |
| 29 | 5.4 | Bright |
| 30 | 5.4 | Bright |
Is April a good time to visit Sarnia?
Our two travel scores rate April for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
April is a weaker month for outdoor sightseeing in Sarnia.
What to pack for Sarnia in April
From April's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In April, Sarnia sees daytime highs around 11°C and nights near 3°C. Pack a warm layer. Worth having: rain gear and sun protection. About 11 days see rain.
Sea temperature near Sarnia in April
The nearest coast averages about 3°C in April — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea at the nearest coast (about 16 km away) is warmest in August at about 22°C and coldest in February near 1°C.
It's comfortable for a long swim from Jul 19 to Sep 8 — about 1.7 months when the water holds above 20°C.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 2 | 1 | 1 | 3 | 7 | 14 | 20 | 22 | 20 | 14 | 9 | 5 |
| Comfort | Bracing | Bracing | Bracing | Bracing | Bracing | Bracing | Refreshing | Refreshing | Cool | Bracing | Bracing | Bracing |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 2 | Bracing |
| Feb | 1 | Bracing |
| Mar | 1 | Bracing |
| Apr | 3 | Bracing |
| May | 7 | Bracing |
| Jun | 14 | Bracing |
| Jul | 20 | Refreshing |
| Aug | 22 | Refreshing |
| Sep | 20 | Cool |
| Oct | 14 | Bracing |
| Nov | 9 | Bracing |
| Dec | 5 | Bracing |
UV index in Sarnia in April
Clear-sky midday UV in April peaks around 5 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Sarnia peaks around June 20 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 20 at about 1 (low).
The index reaches 3 or more — the level where the WHO recommends sun protection — in 8 months of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 2 | 2 | 4 | 5 | 7 | 9 | 8 | 7 | 6 | 3 | 2 | 1 |
| Level | Low | Moderate | Moderate | High | High | Very high | Very high | High | High | Moderate | Moderate | Low |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 2 | Low |
| Feb | 2 | Moderate |
| Mar | 4 | Moderate |
| Apr | 5 | High |
| May | 7 | High |
| Jun | 9 | Very high |
| Jul | 8 | Very high |
| Aug | 7 | High |
| Sep | 6 | High |
| Oct | 3 | Moderate |
| Nov | 2 | Moderate |
| Dec | 1 | Low |
Where is Sarnia?
Sarnia sits at 43.0°N, 82.4°W, 185 m above sea level, in Canada. The nearest listed city is Port Huron, 2.0 km away.
Topography around Sarnia
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Sarnia.
Within 3 km, the terrain around Sarnia has only modest variations in elevation — a maximum elevation change of 19 m around an average of 182 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 69 m; within 80 km, only modest variations in elevation — a maximum elevation change of 216 m.
The land around Sarnia is covered by artificial surfaces (52%) and trees (22%) within 3 km, cropland (27%), trees (25%) and water (24%) within 16 km, and cropland (45%) and water (25%) within 80 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
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 Sarnia (42.9787°, -82.4041°, elevation 185 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. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).