October weather forecastThunder Bay, Canada
October
Weather in October
The weather in October in Thunder Bay continues the autumn trend initiated in September. Cooler temperatures become the norm and there's substantial rainfall. It's the start of the transition period towards much colder months. Autumnal activities such as pumpkin picking and leaf-peeping are popular during this time.Temperature
The arrival of October in Thunder Bay signals a shift in temperature, down from a comfortable 17.7°C (63.9°F) in September to a chilly 9.9°C (49.8°F). Thunder Bay reports an average low-temperature of -0.9°C (30.4°F) during the nights of October.Rainfall
In Thunder Bay, Canada, in October, during 11 rainfall days, 55mm (2.17") of precipitation is typically accumulated. Throughout the year, in Thunder Bay, there are 92.6 rainfall days, and 547mm (21.54") of precipitation is accumulated.Snowfall
Months with snowfall are January through May, September through December. In Thunder Bay, in October, during 3.4 snowfall days, 94mm (3.7") of snow is typically accumulated. Throughout the year, in Thunder Bay, there are 62.7 snowfall days, and 1631mm (64.21") of snow is accumulated.Sea temperature
In October, the average sea temperature is 8°C (46.4°F).Note: Diving into 8°C (46.4°F) is practical below 10°C (50°F), given you're wearing protective swim gear; without it, expect a quick onset of cold shock and a struggle to breathe. Merely touching waters at 13°C (55.4°F) feels ice-cold.
Daylight
In October, the average length of the day in Thunder Bay is 10h and 48min.On the first day of the month, sunrise is at 7:57 am and sunset at 7:35 pm. On the last day of October, sunrise is at 8:42 am and sunset at 6:38 pm EDT.
Sunshine
In October, the average sunshine is 4h.UV index
In Thunder Bay, the average daily maximum UV index in October is 2. A UV Index estimate of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV radiation for average individuals.Note: The maximum UV index of 2 during October translates into these guidelines:
Although prolonged sun exposure does not typically bother most people, children, babies, and those with sensitive skin should always have protection. Considering the harmful UV rays from the Sun during midday, it's essential to reduce exposure. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses. Mark this! Snow reflection can nearly double the UV radiation intensity from the Sun.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in October
Thunder Bay, Canada
- Average high temperature in October: 9.9°C
The warmest month (with the highest average high temperature) is July (24.3°C).
The month with the lowest average high temperature is January (-8°C).
- Average low temperature in October: -0.9°C
The month with the highest average low temperature is July (11.1°C).
The coldest month (with the lowest average low temperature) is January (-20.6°C).
Average rainfall in October
Thunder Bay, Canada
- Average rainfall in October: 55.3mm
The wettest month (with the highest rainfall) is August (89.5mm).
The driest month (with the least rainfall) is January (0.4mm).
Average rainfall days in October
Thunder Bay, Canada
- Average rainfall days in October: 11 days
The month with the highest number of rainy days is June (13.8 days).
The month with the least rainy days is January (0.6 days).
Average snowfall in October
Thunder Bay, Canada
- Average snowfall in October: 94mm
The month with the highest snowfall is December (389mm).
The months with the least snowfall are June, July and August (0mm).
Average snowfall days in October
Thunder Bay, Canada
- Average snowfall days in October: 3.4 days
The month with the highest number of snowfall days is December (13.9 days).
The months with the least snowfall days are June, July and August (0 days).
Average sea temperature in October
Thunder Bay, Canada
- Average sea temperature in October: 8°C
The best months for swimming (with the highest average sea temperature) are August and September (13°C).
The coldest months (with the lowest average sea temperature) are January, February, March and April (2°C).
Average daylight in October /
Average sunshine in October
Thunder Bay, Canada
- Average daylight in October: 10h and 48min
The month with the longest days is June (Average daylight: 16h and 0min).
The month with the shortest days is December (Average daylight: 8h and 24min).
- Average sunshine in October: 4h and 0min
The month with the most sunshine is June (Average sunshine: 8h and 42min).
The months with the least sunshine are November and December (Average sunshine: 2h and 54min).
Average UV index in October
Thunder Bay, Canada
- Average UV index in October: 2
The months with the highest UV index are June and July (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 1).
