14-day forecast · St. Catharines
30-day outlook →TodaySep 1821°10°SunnyA few clouds7%
Day
Sunny. High 21. UV index 6 or high.
- Wind
- N 15 km/h
- Precipitation
- 7% · 0 mm
- UV index (max)
- 6 High
- Air quality (AQHI)
- 3 · Low risk
Night
A few clouds. Low 10.
- Low
- 10°
- Wind
- N 15 km/h
Sunrise6:59 AM
Sunset7:22 PM
Daylight12 h 23 min
Normal21° / 12°
SatSep 1919°15°A mix of sun and cloudChance of showers70%
Day
A mix of sun and cloud. High 19. UV index 7 or high.
- Wind
- E 15 km/h
- Precipitation
- 70% · 0 mm
- UV index (max)
- 7 High
- Air quality (AQHI)
- 2 · Low risk
Night
Cloudy with 70 percent chance of showers. Low 15.
- Low
- 15°
- Precipitation
- 70%
Sunrise7:01 AM
Sunset7:20 PM
Daylight12 h 18 min
SunSep 2019°12°Chance of showersChance of showers70%
Day
Cloudy with 70 percent chance of showers. High 19.
- Precipitation
- 70% · 3 mm
- UV index (max)
- 2 Low
Night
Cloudy with 30 percent chance of showers. Low 12.
- Low
- 12°
- Precipitation
- 30%
Sunrise7:02 AM
Sunset7:18 PM
Daylight12 h 15 min
MonSep 2118°10°CloudyCloudy18%
Day
Cloudy. High 18.
- Precipitation
- 18% · 0 mm
- UV index (max)
- 5 Moderate
Night
Cloudy. Low 10.
- Low
- 10°
Sunrise7:03 AM
Sunset7:16 PM
Daylight12 h 13 min
TueSep 2218°11°CloudyChance of showers60%
Day
Cloudy. High 18.
- Precipitation
- 60% · 0.4 mm
- UV index (max)
- 4 Moderate
Night
Cloudy periods with 60 percent chance of showers. Low 11.
- Low
- 11°
- Precipitation
- 60%
Sunrise7:04 AM
Sunset7:14 PM
Daylight12 h 10 min
WedSep 2316°12°Chance of showersCloudy40%
Day
Cloudy with 40 percent chance of showers. High 16.
- Precipitation
- 40% · 7 mm
- UV index (max)
- 3 Moderate
Night
Cloudy. Low 12.
- Low
- 12°
Sunrise7:05 AM
Sunset7:12 PM
Daylight12 h 7 min
ThuSep 2418°14°Cloudy83%
Day
Cloudy. High 18.
- Precipitation
- 83% · 4 mm
- UV index (max)
- 4 Moderate
Night
Low 14.
- Low
- 14°
Sunrise7:06 AM
Sunset7:11 PM
Daylight12 h 4 min
Days 8–14 · trend, lower confidence
FriSep 2516°14°Partly cloudyNight low 14°17%
Day
Partly cloudy. High 16.
- Wind
- NW 39 km/h
- Wind gusts
- 47 km/h
- Precipitation
- 17% · 0.1 mm
- UV index (max)
- 4 Moderate
Night
Low 14.
- Low
- 14°
Sunrise7:07 AM
Sunset7:09 PM
Daylight12 h 1 min
SourceExtended outlook
SatSep 2617°11°SunnyNight low 11°2%
Day
Sunny. High 17.
- Wind
- N 34 km/h
- Wind gusts
- 42 km/h
- Precipitation
- 2% · 0 mm
- UV index (max)
- 5 Moderate
Night
Low 11.
- Low
- 11°
Sunrise7:08 AM
Sunset7:07 PM
Daylight11 h 58 min
SourceExtended outlook
SunSep 2719°11°SunnyNight low 11°3%
Day
Sunny. High 19.
- Wind
- SW 24 km/h
- Wind gusts
- 34 km/h
- Precipitation
- 3% · 0 mm
- UV index (max)
- 5 Moderate
Night
Low 11.
- Low
- 11°
Sunrise7:10 AM
Sunset7:05 PM
Daylight11 h 55 min
SourceExtended outlook
MonSep 2821°15°SunnyNight low 15°5%
Day
Sunny. High 21.
- Wind
- SW 25 km/h
- Wind gusts
- 38 km/h
- Precipitation
- 5% · 0 mm
- UV index (max)
- 6 High
Night
Low 15.
- Low
- 15°
Sunrise7:11 AM
Sunset7:03 PM
Daylight11 h 52 min
SourceExtended outlook
TueSep 2924°19°Mostly cloudyNight low 19°14%
Day
Mostly cloudy. High 24.
- Wind
- SW 25 km/h
- Wind gusts
- 41 km/h
- Precipitation
- 14% · 0 mm
- UV index (max)
- 6 High
Night
Low 19.
- Low
- 19°
Sunrise7:12 AM
Sunset7:02 PM
Daylight11 h 49 min
SourceExtended outlook
WedSep 3025°19°SunnyNight low 19°10%
Day
Sunny. High 25.
- Wind
- SW 16 km/h
- Wind gusts
- 27 km/h
- Precipitation
- 10% · 0 mm
- UV index (max)
- 6 High
Night
Low 19.
- Low
- 19°
Sunrise7:13 AM
Sunset7:00 PM
Daylight11 h 46 min
SourceExtended outlook
ThuOct 120°14°Mostly cloudyNight low 14°75%
Day
Mostly cloudy. High 20.
- Wind
- NW 27 km/h
- Wind gusts
- 31 km/h
- Precipitation
- 75% · 3 mm
- UV index (max)
- 4 Moderate
Night
Low 14.
- Low
- 14°
Sunrise7:14 AM
Sunset6:58 PM
Daylight11 h 43 min
SourceExtended outlook
14 days at a glance
Today →| Day | Weather | High | Low | Precip | Wind | UV |
|---|---|---|---|---|---|---|
| Today Sep 18 | Sunny | 21° | 10° | 7% · 0 mm | N 15 km/h | 6 |
| Sat Sep 19 | Partly cloudy | 19° | 15° | 70% · 0 mm | E 15 km/h | 7 |
| Sun Sep 20 | Showers | 19° | 12° | 70% · 3 mm | E 25 km/h | 2 |
| Mon Sep 21 | Mostly cloudy | 18° | 10° | 18% · 0 mm | NE 43 km/h | 5 |
| Tue Sep 22 | Mostly cloudy | 18° | 11° | 60% · 0.4 mm | E 43 km/h | 4 |
| Wed Sep 23 | Showers | 16° | 12° | 40% · 7 mm | E 34 km/h | 3 |
| Thu Sep 24 | Mostly cloudy | 18° | 14° | 83% · 4 mm | W 28 km/h | 4 |
| Fri Sep 25 | Partly cloudy | 16° | 14° | 17% · 0.1 mm | NW 39 km/h | 4 |
| Sat Sep 26 | Sunny | 17° | 11° | 2% · 0 mm | N 34 km/h | 5 |
| Sun Sep 27 | Sunny | 19° | 11° | 3% · 0 mm | SW 24 km/h | 5 |
| Mon Sep 28 | Sunny | 21° | 15° | 5% · 0 mm | SW 25 km/h | 6 |
| Tue Sep 29 | Mostly cloudy | 24° | 19° | 14% · 0 mm | SW 25 km/h | 6 |
| Wed Sep 30 | Sunny | 25° | 19° | 10% · 0 mm | SW 16 km/h | 6 |
| Thu Oct 1 | Mostly cloudy | 20° | 14° | 75% · 3 mm | NW 27 km/h | 4 |
Weather map — St. Catharines
St. Catharines →Forecast: Environment and Climate Change Canada (St. Catharines - Grimsby - Northern Niagara Region), issued 11:00 AM · Days 8–14: WeatherAPI.com · weather.gc.ca · 43.1713°N, 79.2427°W · Elevation 102 m · Population 136,803 · Time zone America/Toronto