Click on a day for an hourly weather forecast
The weather in Saint John in March is very cold with temperatures between -4°C and 2°C, warm clothes are a must.
You can expect rain for roughly half of the month of March in Saint John. We’re expecting roughly 8 to 15 days of rain, so your rubber boots and umbrella are going to see plenty of use this month if you’re keen on staying dry.
Saint John is going to experience quite a number of days of snow during March. It’s the perfect time to build snowmen, drink hot cocoa, and have a snowball fight. Just remember to wear a warm scarf and a pair of mittens!
Our weather forecast can give you a great sense of what weather to expect in Saint John in March 2025.
If you’re planning to visit Saint John in the near future, we highly recommend that you review the 14 day weather forecast for Saint John before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | -2° / -9° | 6 | 10 | 16 | 88 mm | Awful | Saint John in January |
| February | -2° / -8° | 5 | 8 | 15 | 77 mm | Awful | Saint John in February |
| March | 2° / -4° | 8 | 10 | 13 | 78 mm | Awful | Saint John in March |
| April | 7° / 1° | 8 | 17 | 5 | 79 mm | Awful | Saint John in April |
| May | 13° / 6° | 7 | 24 | 0 | 95 mm | Bad | Saint John in May |
| June | 17° / 10° | 6 | 24 | 0 | 95 mm | Good | Saint John in June |
| July | 21° / 14° | 4 | 27 | 0 | 75 mm | Good | Saint John in July |
| August | 22° / 14° | 3 | 28 | 0 | 63 mm | Good | Saint John in August |
| September | 18° / 11° | 4 | 26 | 0 | 72 mm | Good | Saint John in September |
| October | 13° / 7° | 5 | 25 | 0 | 83 mm | Ok | Saint John in October |
| November | 7° / 1° | 7 | 19 | 5 | 91 mm | Awful | Saint John in November |
| December | 1° / -4° | 7 | 13 | 11 | 110 mm | Awful | Saint John in December |