Saint John in september: average Weather, Temperature and Climate
Weather in Saint John in september 2025
The weather in Saint John in september comes from statistical datas on the past years. You can view the weather statistics the entire month, but also navigating through the tabs for the beginning, the middle and the end of the month.
Average weather throughout september
good weather
Weather at 6am
58°F
Clear/Sunny
43% of time
23%
17%
9%
Weather at 12pm
67°F
Clear/Sunny
51% of time
21%
16%
8%
Weather at 6pm
59°F
Clear/Sunny
46% of time
20%
18%
10%
Weather at 3am
56°F
39%
18%
13%
13%
Evolution of daily average temperature and precipitation in Saint John in september
These charts show the evolution of average minimum/maximum temperatures as well as average daily precipitation volume in Saint John in september.
The climate of Saint John in september is good
The climate in september in Saint John is relatively dry (with 2.9in of precipitation over 4 days). It should be noted a worsening from the previous month since in august there is an average of 2.5in of rainfall over 3 days.
The climate quite good in this city september. The high seasonal norm is 67°F. The minimum is 58°F. Thus, the mean temperature average on this month of september in Saint John is 61°F. Note that these seasonal averages are in contrast with those observed in Saint John in september with a maximum record of 81°F in 2010 and a minimum record of 40°F in 2020. You can plan to have about 19 days with temperatures above 65°F, or 63% of time.
On average, in Saint John, the days of september last 12:32. The sun rises at 06:03 and sets at 18:35.
With a good weather, this month is a good month to go in Saint John in Canada.
Seasonal average climate and temperature of Saint John in september
Check below seasonal norms These datas are generated from the weather statements of the past years of the month of september.
| September | |||||
| Outside temperature | |||||
| Average temperature | 61°F | ||||
| Highest temperature | 67°F | ||||
| Lowest temperature | 58°F | ||||
| Highest record temperature | 81°F (2010) | ||||
| Lowest record temperature | 40°F (2020) | ||||
| Number of days at +65°F | 19 day(s) (63%) | ||||
| Sea temperature | |||||
| Average sea temperature | 56°F | ||||
| Lowest sea temperature | 54°F | ||||
| Highest sea temperature | 58°F | ||||
| Wind | |||||
| Wind speed | 19km/h | ||||
| Wind temperature | 56°F | ||||
| Precipitation (rainfall) | |||||
| Rainfall | 2.9in | ||||
| Number of days with rainfall | 4 day(s) (13%) | ||||
| Record daily rainfall | 3.1in (2015) | ||||
| Snowfall | 0cm | ||||
| Other climate data | |||||
| Humidity | 86% | ||||
| Visibility | 9.09km | ||||
| Cloud cover | 39% | ||||
| UV index | 5 | ||||
| Daily sunshine hours | 11 | ||||
| Sunrise and sunset | |||||
| Time of sunrise | 06:03 | ||||
| Time of sunset | 18:35 | ||||
| Length of day | 12:32 | ||||
| Our opinion about the weather in september | |||||
| Our opinion at whereandwhen.net | good | ||||
How was the weather last september?
Here is the day by day recorded weather in Saint John in september 2024:
61°F to 65°F
59°F to 68°F
45°F to 67°F
49°F to 74°F
56°F to 81°F
50°F to 74°F
58°F to 59°F
56°F to 61°F
45°F to 67°F
47°F to 65°F
45°F to 68°F
54°F to 79°F
58°F to 79°F
54°F to 72°F
50°F to 77°F
58°F to 83°F
65°F to 83°F
68°F to 83°F
61°F to 72°F
58°F to 63°F
56°F to 61°F
52°F to 63°F
52°F to 61°F
52°F to 61°F
56°F to 65°F
56°F to 59°F
56°F to 59°F
58°F to 59°F
47°F to 67°F
59°F to 67°F
Map: other cities in Canada in september
Cities near Saint John:
| Fredericton in september | good weather |
| Fundy National Park in september | good weather |
| Moncton in september | good weather |
| Yarmouth in september | good weather |
| Miramichi in september | good weather |
| Hebron (Prince Edward Island) in september | good weather |
| Halifax in september | good weather |
| Charlottetown in september | good weather |
| Bathurst in september | good weather |
| Cape Breton Island in september | good weather |
| Quebec City in september | good weather |
| Sydney in september | good weather |
Click over cities on the map for information about the weather in september.
Saint John
perfect weather
good
tolerable
bad
very bad
Weather data for Saint John in september:
Weather data for Saint John for september are derived from an average of the weather forecast since 2009 in Saint John. There is a margin of error and these forecasts are to be considered as general information only. The weather in Saint John can vary slightly from year to year, but this data should limit surprises. So you can pack your bags or check for the best time in year to go to Saint John.