Grand Portage weather in August 2025

Expect 23°C daytime maximum temperatures in the shade with on average 8 hours of sunshine per day in Grand Portage in August. Check more long-term weather averages for Grand Portage in August before you book your next holiday to Minnesota in 2025/2026.

• 23
  23°C max day temperature
• 8
  8 hours of sunshine per day
• 12
  12 days with some rainfall
• 10
  10°C min night temperature
• 14
  14 hours of daylight per day
• 0
  No heat & humidity
• 89
  89 mm of monthly rainfall
• 7
  7 (High) UV index
• 15
  15°C sea temperature

More about Grand Portage

• 
  Overview
• 
  Best time to visit
• 
  Weather by month
• 
  5-day weather forecast
• 
  Destinations
• 
  Travel advice
• 
  Deals & discounts

Grand Portage by month

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Recommended for Minnesota

• Love Holidays^*
• Saga Holidays^*
• Cosmos^*
• Resort Pass^*

Marriott discount code: Kids stay & eat for free

Discount Code

• Kids stay & eat for free at Marriot Bonvoy
• Destinations include Europe, Middle East & Africa
• Valid for up to 2 adults & 2 kids aged up to 12

Show discount code ******ZJ6

Redeem Marriott discount code >>

View all Marriott offers

The August weather guide for Minnesota (Grand Portage) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Metric (°C / mm)  |  Imperial (°F / inches)

Back to top

More about the USA

Grand Portage August sunrise & sunset times

Browse the sunrise and sunset times for Grand Portage in August 2025. Select a month to view Grand Portage sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Related posts

Popular travel offers

Explore holidays in the sun for less

• Beach holidays
• Family holidays
• City breaks
• Summer holidays
• Winter sun holidays
• Holiday offers
• Top travel brands
• Airlines & flights
• Discount hotels
• Airport parking deals
• TUI
• Jet2holidays
• easyJet holidays
• Love Holidays
• Boxing Day sales

More holidays

Airport parking

• Manchester Airport
• Stansted Airport
• Bristol Airport
• Luton Airport
• Birmingham Airport
• Edinburgh Airport
• Gatwick Airport
• Glasgow Airport
• Newcastle Airport

More parking

Airport lounges

• Manchester Airport
• Birmingham Airport
• Bristol Airport
• Edinburgh Airport
• Glasgow Airport
• Heathrow Airport
• Newcastle Airport
• Stansted Airport
• Gatwick Airport

More lounges

Top ^