Climate and monthly weather forecastPortage, MI
Climate and monthly weather forecast
The climate of Portage
With its geographical setting in the state of Michigan, Portage exhibits a seasonal climate categorized under the Köppen classification as Dfa. This signifies a humid continental climate with no dry season and hot summers.Temperatures in Portage fluctuate significantly over the year. They range drastically from a low of 18°F (-7.8°C) to a high of 79.7°F (26.5°C). The heat peaks in July with a temperature high of 79.7°F (26.5°C) while the cold is most severe in February with the lowest temperature reading of 18°F (-7.8°C). The region also boasts an interesting pattern in humidity with readings that oscillate slightly from a low of 77% to a high of 87%.
The city records an average of 1.73" (44mm) to 3.62" (92mm) of rainfall monthly, with the wettest period being in May. Contrary, to the rainfall, snowfall is prominent from December to April with the most snowfall in inches observed in January and December.
Portage experiences varying daylight hours throughout the year. A high of 15.2 hours is observed in June while a minimum of 9.2 hours is typical in December.
The cloud cover here shows a wide range from a minimum of 31% during the summer months of July to a maximum of 73% in January. Wind speeds are moderate, fluctuating between 6.3mph (10.1km/h) to 10.1mph (16.3km/h).
The best time to visit Portage
Considering the weather parameters, the opportune time to visit Portage falls between May and September. This period boasts comfortable temperatures that fluctuate between 67.3°F (19.6°C) and 79.7°F (26.5°C), superior to other months. This period also experiences lower snowfall, with less than 0.12" (3mm) and a significant increase in daylight hours, from 14.6 hours to 14.9 hours. Along with this, the UV index is relatively high, providing excellent conditions for outdoor activities.The worst time to visit Portage
Bearing the harsh low temperatures from 18°F (-7.8°C) to 31.5°F (-0.3°C), January and February might be considered the least ideal months to visit Portage. These months also have a higher likelihood of snowfall, with January recording the highest snowfall of 5.12" (130mm). The daylight hours are relatively lower, with January recording the least of 9.5 hours.Spring weather in Portage
Spring in Portage runs from March to May. The temperatures start to rise in March from 43.5°F (6.4°C) to 67.3°F (19.6°C) in May. March records the highest rainfall in spring, with an average of 3.46" (88mm), while May records the highest levels of daylight, at 14.6 hours, and sunshine hours, at 8.5 hours. Similarly, the wind speeds decrease gradually from March to May, falling from 10mph (16.1km/h) to 8.5mph (13.7km/h).Summer weather in Portage
Summer showers through June to August with temperatures rising from 75.4°F (24.1°C) to 79.7°F (26.5°C). Rainfall averages between 2.8" (71mm) and 3.11" (79mm). Sunshine hours peak in July at 10.2 hours per day while daylight is highest in June, reaching an average of 15.2 hours. The period also sees a drop in wind speed and pressure, making it an ideal time for outdoor activities.Autumn weather in Portage
The weather from September to November marks the autumn season. Temperatures start to lower starting from 72.5°F (22.5°C) in September to 45.7°F (7.6°C) in November. Rainfall rises towards the end of autumn, with a high of 3.15" (80mm) in October. Daylight hours range from 12.5 hours in September to 9.8 hours in November; sunshine hours during this period fall from 8.1 hours to 4.5 hours.Winter weather in Portage
Winter in Portage sets in December and runs through to February. These months exhibit lower temperatures ranging from 28.4°F (-2°C) in December to 31.5°F (-0.3°C) in February. Snowfall during these months is also notable, with the highest observed in December and January, making it a perfect season for winter sports. Daylight hours are the shortest and wind speeds spike, making it the coldest period of the year.Weather in January
January in Portage, Michigan, greets residents and visitors with one of the coldest months, boasting a high average temperature of just 28.4°F (-2°C) and low temperatures dropping to an average of 18°F (-7.8°C). Snowfall is a common occurrence, as it is one of the months of highest snowfall, making it a picturesque winter wonderland. Weather in January »Weather in February
By February, the clasp of winter starts to loosen slightly in Portage. Average high temperature raises slightly comparing to January, up to 31.5°F (-0.3°C) while the average low remains chilling at 19.8°F (-6.8°C). Moving forward from the coldest month, February offers marginally longer daylight hours; however, overcast skies remain a constant with 69% cloud coverage. Weather in February »Weather in March
With March, Portage experiences a significant rise in temperature paving the way for spring, with average highs climbing to 43.5°F (6.4°C) and lows to 28.8°F (-1.8°C). A noticeable shift from the thick winter blanket can be sensed as snowfall drops to 2.32" (59mm), significantly lower than the preceding winter months. Weather in March »Weather in April
April in Portage, Michigan, marks a clear transition from winter to spring. The temperatures rise comfortably, and nature starts displaying its blossoms. The high temperature sees a steep rise from March, reaching up to 55.2°F (12.9°C), with the snowfall nearly disappearing at a meagre average of 1.69" (43mm). Weather in April »Weather in May
May in Portage, Michigan, undeniably belongs to spring. Despite a considerable increase in temperatures with highs averaging to 67.3°F (19.6°C), May brings one of the highest humidity levels at around 80%. The weather becomes more favourable, enhancing outdoor activities that include fishing, bird watching, and more. Weather in May »Weather in June
June marks the beginning of summer in Portage, Michigan, with temperatures reaching a comfortable average high of 75.4°F (24.1°C). This cheerful arrival of summer, accompanied by maximum daylight hours up to 15.2 hours per day, translates into more extended outdoor recreation time. Weather in June »Weather in July
July stands as the peak of summer and the warmest month in Portage, Michigan, with the average high temperature soaring to 79.7°F (26.5°C). The humidity hovers consistently from June, still standing at around 81%, which some may find quite muggy. Weather in July »Weather in August
August experiences a slight reduction in temperature, cooling down to an average high of 78.3°F (25.7°C). Still, it is still rooted in the summer territory with warm and longer days. August carries forward the dry spell of July, which accompanies some excellent weather periods. Weather in August »Weather in September
September in Portage, Michigan, marks the end of summer and the start of fall. The temperatures begin a gradual decrease with average highs dropping to 72.5°F (22.5°C), introducing a mild chill in the air. While the humidity levels also drop slightly compared to August, the transition from summer to fall is otherwise smooth. Weather in September »Weather in October
October brings the full bounty of fall to Portage, Michigan, with temperatures falling to average highs of 59.5°F (15.3°C) making it a particularly cooler month. The leaves turn color, and the changing landscape offers a vibrant spectacle, perfect for sightseeing and photography. Weather in October »Weather in November
In November, the slow and steady grip of winter begins to tighten with high temperatures averaging to 45.7°F (7.6°C). This month sees a significant drop in temperature and daylight hours from October, elevating the need for warm layers and hot drinks. Weather in November »Weather in December
December brings the full force of winter to Portage, Michigan, with average high temperatures dropping to 34.7°F (1.5°C). Counted among the coldest months, it blankets the city in white with an average of 3.15" (80mm) of snowfall. Weather in December »Updated: Jul 31, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
In Portage, January registers the lowest temperatures, averaging 28.4°F (-2°C) at the peak and 18°F (-7.8°C) at the lowest.
With an average relative humidity of 87%, January is the most humid month in Portage.
Throughout the year, there are 158.4 rainfall days, and 29.88" (759mm) of precipitation is accumulated.
Months with snowfall are January through May, October through December.
In Portage, Michigan, during the entire year, snow falls for 62.4 days and aggregates up to 20.24" (514mm) of snow.
The month with the least sunshine is January, with an average of 2.7h of sunshine.
The months with the lowest UV index are January and December, with an average maximum UV index of 1.
The month with the most snowfall is February, when snow falls for 14.8 days and typically aggregates up to 5.12" (130mm) of snow.
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, and the time zone changes from EST to EDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from EDT to EST.
The months with the lowest humidity are April and October, with an average relative humidity of 77%.
May is the month with the most rainfall. Rain falls for 18.3 days and accumulates 3.62" (92mm) of precipitation.
June through September are months without snowfall.
June has the longest days of the year, with an average of 15h and 12min of daylight.
June and August, with an average maximum UV index of 6, are months with the highest UV index.
With average high temperatures of 79.7°F (26.5°C) and lows of 61.5°F (16.4°C), July is the warmest month.
July has the most sunshine of the year, with an average of 10.2h of sunshine.
The month with the least rainfall is November, when the rain falls for 10.5 days and typically collects 1.73" (44mm) of precipitation.
December has the shortest days of the year in Portage, with an average of 9h and 12min of daylight.
Average temperature
Portage, MI
The warmest month (with the highest average high temperature) is July (79.7°F).
The month with the lowest average high temperature is January (28.4°F).
The month with the highest average low temperature is July (61.5°F).
The coldest month (with the lowest average low temperature) is January (18°F).
Average pressure
Portage, MI
- Average pressure in January:
30.09"Hg - Average pressure in February:
30.08"Hg - Average pressure in March:
30.09"Hg - Average pressure in April:
29.96"Hg - Average pressure in May:
29.97"Hg - Average pressure in June:
29.93"Hg
- Average pressure in July:
29.96"Hg - Average pressure in August:
29.98"Hg - Average pressure in September:
30.03"Hg - Average pressure in October:
30"Hg - Average pressure in November:
30.09"Hg - Average pressure in December:
30.08"Hg
The months with the highest atmospheric pressure are January, March and November (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed
Portage, MI
- Average wind speed in January:
10.1mph - Average wind speed in February:
10mph - Average wind speed in March:
9.6mph - Average wind speed in April:
10mph - Average wind speed in May:
8.5mph - Average wind speed in June:
7.4mph
- Average wind speed in July:
6.3mph - Average wind speed in August:
6.4mph - Average wind speed in September:
7.2mph - Average wind speed in October:
8.9mph - Average wind speed in November:
9.7mph - Average wind speed in December:
9.7mph
The windiest month (with the highest average wind speed) is January (10.1mph).
The calmest month (with the lowest average wind speed) is July (6.3mph).
Average humidity
Portage, MI
The month with the highest relative humidity is January (87%).
The months with the lowest relative humidity are April and October (77%).
Average rainfall
Portage, MI
- Average rainfall in January:
1.93" - Average rainfall in February:
1.81" - Average rainfall in March:
2.01" - Average rainfall in April:
3.46" - Average rainfall in May:
3.62" - Average rainfall in June:
3.11"
- Average rainfall in July:
2.8" - Average rainfall in August:
2.56" - Average rainfall in September:
1.89" - Average rainfall in October:
3.15" - Average rainfall in November:
1.73" - Average rainfall in December:
1.81"
The wettest month (with the highest rainfall) is May (3.62").
The driest month (with the least rainfall) is November (1.73").
Average rainfall days
Portage, MI
- Average rainfall days in January:
6.6 days - Average rainfall days in February:
5.2 days - Average rainfall days in March:
11.6 days - Average rainfall days in April:
17.3 days - Average rainfall days in May:
18.3 days - Average rainfall days in June:
16.2 days
- Average rainfall days in July:
17.3 days - Average rainfall days in August:
16.1 days - Average rainfall days in September:
14.4 days - Average rainfall days in October:
15.9 days - Average rainfall days in November:
10.5 days - Average rainfall days in December:
9 days
The month with the highest number of rainy days is May (18.3 days).
The month with the least rainy days is February (5.2 days).
Average snowfall
Portage, MI
- Average snowfall in January:
5.08" - Average snowfall in February:
5.12" - Average snowfall in March:
2.32" - Average snowfall in April:
1.69" - Average snowfall in May:
0.12" - Average snowfall in June:
0"
The month with the highest snowfall is February (5.12").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days
Portage, MI
- Average snowfall days in January:
16.6 days - Average snowfall days in February:
14.8 days - Average snowfall days in March:
7.5 days - Average snowfall days in April:
2.7 days - Average snowfall days in May:
0.2 days - Average snowfall days in June:
0 days
- Average snowfall days in July:
0 days - Average snowfall days in August:
0 days - Average snowfall days in September:
0 days - Average snowfall days in October:
0.5 days - Average snowfall days in November:
7.1 days - Average snowfall days in December:
13 days
The month with the highest number of snowfall days is January (16.6 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Portage, MI
- Average daylight in January:
9h and 30min - Average daylight in February:
10h and 36min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 24min - Average daylight in May:
14h and 36min - Average daylight in June:
15h and 12min
- Average daylight in July:
14h and 54min - Average daylight in August:
13h and 48min - Average daylight in September:
12h and 30min - Average daylight in October:
11h and 6min - Average daylight in November:
9h and 48min - Average daylight in December:
9h and 12min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in January:
2h and 42min - Average sunshine in February:
3h and 42min - Average sunshine in March:
5h and 42min - Average sunshine in April:
6h and 42min - Average sunshine in May:
8h and 30min - Average sunshine in June:
9h and 42min
- Average sunshine in July:
10h and 12min - Average sunshine in August:
9h and 36min - Average sunshine in September:
8h and 6min - Average sunshine in October:
5h and 42min - Average sunshine in November:
4h and 30min - Average sunshine in December:
3h and 12min
The month with the most sunshine is July (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 2h and 42min).
Average sunshine days
Portage, MI
- Average sunshine days in January:
10.3 days - Average sunshine days in February:
9.8 days - Average sunshine days in March:
12.8 days - Average sunshine days in April:
9.9 days - Average sunshine days in May:
10.9 days - Average sunshine days in June:
11.3 days
- Average sunshine days in July:
11.5 days - Average sunshine days in August:
11.5 days - Average sunshine days in September:
13.3 days - Average sunshine days in October:
12.5 days - Average sunshine days in November:
13.5 days - Average sunshine days in December:
11.6 days
The month with the most sunshine days is November (13.5 days).
The month with the least sunshine days is February (9.8 days).
Average UV index
Portage, MI
The months with the highest UV index are June and August (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover
Portage, MI
The month with the most cloud cover is January (Cloud cover 73).
The month with the least cloud cover is July (Cloud cover 31).
Average visibility
Portage, MI
The months with the highest visibility are March, April, May, June, July, October and November (6mi).
The months with the lowest visibility are January, February, August, September and December (5mi).
