Climate and monthly weather forecastSpencer, IA
Climate and monthly weather forecast
The climate of Spencer
Situated in the U.S. state of Iowa, Spencer falls under the Dfa category of the Köppen climate classification, signifying a humid continental climate with no defined dry season and summers that are typically hot. Across the months, weather conditions vary substantially, offering a diverse climatic experience.Rainfall patterns reveal a wide-ranging scope. The wettest month tends to be in June, with an average rainfall of 2.44" (62mm), while the driest periods are recorded in February and November, each averaging a rainfall around 0.55" (14mm). The frequency of rainy days peaks between April and June, fluctuating from 13.3 to 15.5 days.
Temperature fluctuations present a clear distinction between seasons. Peak temperatures of 80.2°F (26.8°C) are typically seen in July, gradually decreasing to lows of 10.6°F (-11.9°C) in January. Similarly, humidity levels rise to their highest point at 87% in January, then descend to their lowest point of 68% by October.
Notably, snowfall is entirely absent from June through September. The heaviest snowfall of 2.2" (56mm) occurs in January, accompanied by 10.8 snowfall days. Spencer also experiences most sunshine during July, with an impressive 10.4 hours of sunlight per day.
The best time to visit Spencer
Determining the ideal time to visit Spencer invariably depends on personal weather preferences. Nonetheless, if warmer weather is the primary consideration, July, with its average high temperature of 80.2°F (26.8°C) and abundant sunshine of 10.4 hours per day, would be most fitting. This period also coincides with the lowest cloud cover of 30%, allowing for clearer skies for outdoor activities. Although it is also the period with high relative humidity of 80%, it is moderated by a gentle 7.6mph (12.2km/h) wind.The worst time to visit Spencer
Equally subjective, defining the least opportune time to visit would depend on weather tolerances. January could be considered as less desirable due to its frigid average low temperatures of 10.6°F (-11.9°C) and reduced daylight hours of 9.4. It also brings the highest relative humidity of 87%, alongside substantial snowfall of 2.2" (56mm) spread over 10.8 days.Spring weather in Spencer
Spring in Spencer arrives with a gradual upswing in temperatures from 42.4°F (5.8°C) in March to a mild 67.8°F (19.9°C) in May. There's an increase in rain from 1.02" (26mm) in March to 2.13" (54mm) by the end of spring in May. Despite the higher humidity levels, ranging from 69% in March and May to 77% in April, the season is generally comfortable for outdoor activities.Summer weather in Spencer
Summer ushers in the warmest temperatures of the year in Spencer, ranging between 72.9°F (22.7°C) in September to a peak of 80.2°F (26.8°C) in July. Relative humidity is moderately high during this period, from 77% in June to 80% in July, then slightly reduced to 79% in August. Rainfall levels range from 1.57" (40mm) to 2.44" (62mm) across the span of the season, with June recording the highest rainfall of the year.Autumn weather in Spencer
Autumn is characterized by a steady drop in temperatures, cooling down from 72.9°F (22.7°C) in September to a much cooler 43.2°F (6.2°C) by November. Along with this comes lower rainfall, decreasing from 1.3" (33mm) in September to 0.55" (14mm) in November, which is one of the driest months of the year. The relative humidity at this time does not vary much, remaining in the 68% to 74% range.Winter weather in Spencer
Winter brings a significant drop in temperatures, reaching frigid lows of 10.6°F (-11.9°C) in January from 28.2°F (-2.1°C) in December. Correspondingly, precipitation during this season is predominantly in the form of snowfall, peaking at 2.2" (56mm) in January. Despite the coolest temperatures, this season witnesses more daylight hours compared to that of autumn, with 9 hours per day in December to a slightly shorter 9.4 hours in January.Weather in January
January brings the chilled breeze to Spencer, Iowa, with the highest and lowest temperatures ranging from 22.8°F (-5.1°C) to 10.6°F (-11.9°C). It paves the way for the cooler months of the year with heavy snowfall during most of the days. Weather in January »Weather in February
Spencer experiences a slight increment in temperature in February, a subtle transition from the severe cold of January. However, winter's presence prominently lingers, with snowfall continuing to grace the city's skyline. The number of daylight hours starts to increase slowly, hinting at the upcoming spring season. Weather in February »Weather in March
An emphatic emergence of spring is witnessed in March, diversifying the weather spectrum of Spencer. Despite the brief episodes of snowfall, the city sees a significant rise in temperature. The late March evenings bring joy, as people flock to parks and vibrant flower blossoms mark the onset of a new season. Weather in March »Weather in April
In April, Spencer wholeheartedly welcomes spring, bidding winter a definite goodbye. The warmth slowly settles in, with residents unboxing their lighter clothing, sun hats, and sunglasses. Outdoors have a lively ambiance, owing to the longer daylight hours, enhancing the overall spirits in the city. Weather in April »Weather in May
The weather of May in Spencer delivers an intense version of spring. The city experiences the highest rainfall of the year with rainfall inches being 0.08" (2mm), adding to the freshness. Nature performs its best as blooming flowers spread their vibrancy around, and trees wear a thicker green coat. Weather in May »Weather in June
June marks the start of summer in Spencer, Iowa, with temperatures rising and days getting longer. The city's landscapes change from blooming spring colors to the deeper hues of summer. The summer heat is balanced with occasional showers, offering some respite from the ascending mercury. Weather in June »Weather in July
In July, Spencer is at the peak of summer, with highest temperatures reaching up to 80.2°F (26.8°C). Despite the soaring temperatures, life goes on unabated, embracing the summer rhythm. Parks and open spaces become popular spots to engage in summer activities such as cycling and outdoor games. Weather in July »Weather in August
August continues to serve a hot plate of summer to Spencer, but promising signs of a cooler season ahead start to appear. The month retains the warmth but starts to moderate, paving the way for the transitional phase. The aura of the city is bright and sunny, matching the glowing summer weather. Weather in August »Weather in September
The month of September brings a visible change to Spencer's weather, with a shift from sweltering heat to cooler climes. The aroma of pumpkin spices and apple pies fills the air, signifying autumn's arrival. The changing colors of leaves from green to shades of orange and red bring a refreshing aesthetic to the city's landscapes. Weather in September »Weather in October
In October, Spencer is in the heart of autumn, experiencing a moderate climate. While the city adapts the coolness, it's not rare to have the occasional warm day. The city is adorned with Halloween decorations, adding to its autumn charm. Weather in October »Weather in November
As November rolls in, it prepares Spencer for the upcoming winter. The temperature dips, signaling the withdrawal of autumn and arrival of cooler times. Bare trees, fading fall colors, and early sunsets become regular sights across the city. Weather in November »Weather in December
December announces the true onset of winter in Spencer, Iowa. The daily highest and lowest temperatures vary from 27.5°F (-2.5°C) to 16.9°F (-8.4°C). The snow starts to cover the cityscape, transforming it into a winter wonderland. Weather in December »Updated: Jun 23, 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
Spencer's January weather reaches an average high of 22.8°F (-5.1°C) and an average low of 10.6°F (-11.9°C), making it the coldest month.
January is the most humid month, with an average relative humidity of 87%.
January is the month with the least rainfall. Rain falls for 3.1 days and accumulates 0.43" (11mm) of precipitation.
In Spencer, during the entire year, the rain falls for 112.3 days and collects up to 15.31" (389mm) of precipitation.
Months with snowfall are January through May, October through December.
In Spencer, Iowa, during the entire year, snow falls for 45.5 days and aggregates up to 11.14" (283mm) of snow.
With an average of 4h of sunshine, January has the least sunshine of the year.
The months with the lowest UV index are January and February, with an average maximum UV index of 1.
February is the month with the most snowfall. Snow falls for 9.5 days and accumulates 2.72" (69mm) of snow.
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, and the time zone changes from CST to CDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from CDT to CST.
June is the month with the most rainfall. Rain falls for 15.4 days and accumulates 2.44" (62mm) of precipitation.
June through September are months without snowfall.
June has the longest days of the year, with an average of 15h and 18min of daylight.
The months with the highest UV index are June and July, with an average maximum UV index of 6.
July, marked by an average high-temperature of 80.2°F (26.8°C) and a low-temperature of 63.1°F (17.3°C), is the warmest month.
The month with the most sunshine is July, with an average of 10.4h of sunshine.
The least humid month is October, with an average relative humidity of 68%.
The month with the shortest days is December, with an average of 9h and 6min of daylight.
Average temperature
Spencer, IA
The warmest month (with the highest average high temperature) is July (80.2°F).
The month with the lowest average high temperature is January (22.8°F).
The month with the highest average low temperature is July (63.1°F).
The coldest month (with the lowest average low temperature) is January (10.6°F).
Average pressure
Spencer, IA
- Average pressure in January:
30.16"Hg - Average pressure in February:
30.15"Hg - Average pressure in March:
30.07"Hg - Average pressure in April:
29.93"Hg - Average pressure in May:
29.93"Hg - Average pressure in June:
29.87"Hg
- Average pressure in July:
29.95"Hg - Average pressure in August:
29.96"Hg - Average pressure in September:
30"Hg - Average pressure in October:
29.99"Hg - Average pressure in November:
30.07"Hg - Average pressure in December:
30.12"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.87"Hg).
Average wind speed
Spencer, IA
- Average wind speed in January:
11.1mph - Average wind speed in February:
11mph - Average wind speed in March:
10.9mph - Average wind speed in April:
11.1mph - Average wind speed in May:
9.7mph - Average wind speed in June:
8.7mph
- Average wind speed in July:
7.6mph - Average wind speed in August:
7.8mph - Average wind speed in September:
9mph - Average wind speed in October:
10.4mph - Average wind speed in November:
10.8mph - Average wind speed in December:
10.7mph
The windiest months (with the highest average wind speed) are January and April (11.1mph).
The calmest month (with the lowest average wind speed) is July (7.6mph).
Average humidity
Spencer, IA
The month with the highest relative humidity is January (87%).
The month with the lowest relative humidity is October (68%).
Average rainfall
Spencer, IA
- Average rainfall in January:
0.43" - Average rainfall in February:
0.55" - Average rainfall in March:
1.02" - Average rainfall in April:
1.61" - Average rainfall in May:
2.13" - Average rainfall in June:
2.44"
- Average rainfall in July:
1.57" - Average rainfall in August:
1.61" - Average rainfall in September:
1.3" - Average rainfall in October:
1.26" - Average rainfall in November:
0.55" - Average rainfall in December:
0.83"
The wettest month (with the highest rainfall) is June (2.44").
The driest month (with the least rainfall) is January (0.43").
Average rainfall days
Spencer, IA
- Average rainfall days in January:
3.1 days - Average rainfall days in February:
2.7 days - Average rainfall days in March:
8 days - Average rainfall days in April:
13.3 days - Average rainfall days in May:
15.5 days - Average rainfall days in June:
15.4 days
- Average rainfall days in July:
13.3 days - Average rainfall days in August:
12.6 days - Average rainfall days in September:
10.5 days - Average rainfall days in October:
9.1 days - Average rainfall days in November:
4.8 days - Average rainfall days in December:
4 days
The month with the highest number of rainy days is May (15.5 days).
The month with the least rainy days is February (2.7 days).
Average snowfall
Spencer, IA
- Average snowfall in January:
2.2" - Average snowfall in February:
2.72" - Average snowfall in March:
1.81" - Average snowfall in April:
0.79" - Average snowfall in May:
0.12" - Average snowfall in June:
0"
The month with the highest snowfall is February (2.72").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days
Spencer, IA
- Average snowfall days in January:
10.8 days - Average snowfall days in February:
9.5 days - Average snowfall days in March:
6.7 days - Average snowfall days in April:
2.3 days - Average snowfall days in May:
0.3 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:
1.5 days - Average snowfall days in November:
4.5 days - Average snowfall days in December:
9.9 days
The month with the highest number of snowfall days is January (10.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Spencer, IA
- Average daylight in January:
9h and 24min - 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 42min - Average daylight in June:
15h and 18min
- Average daylight in July:
15h and 0min - Average daylight in August:
13h and 54min - Average daylight in September:
12h and 30min - Average daylight in October:
11h and 0min - Average daylight in November:
9h and 42min - Average daylight in December:
9h and 6min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in January:
4h and 0min - Average sunshine in February:
4h and 48min - Average sunshine in March:
6h and 6min - Average sunshine in April:
7h and 54min - Average sunshine in May:
8h and 42min - Average sunshine in June:
9h and 42min
- Average sunshine in July:
10h and 24min - Average sunshine in August:
9h and 36min - Average sunshine in September:
9h and 0min - Average sunshine in October:
5h and 42min - Average sunshine in November:
5h and 24min - Average sunshine in December:
4h and 24min
The month with the most sunshine is July (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 4h and 0min).
Average sunshine days
Spencer, IA
- Average sunshine days in January:
19.1 days - Average sunshine days in February:
17.8 days - Average sunshine days in March:
17.4 days - Average sunshine days in April:
13.7 days - Average sunshine days in May:
12.6 days - Average sunshine days in June:
10.8 days
- Average sunshine days in July:
14.1 days - Average sunshine days in August:
15.3 days - Average sunshine days in September:
17.5 days - Average sunshine days in October:
19.4 days - Average sunshine days in November:
20.1 days - Average sunshine days in December:
19.2 days
The month with the most sunshine days is November (20.1 days).
The month with the least sunshine days is June (10.8 days).
Average UV index
Spencer, IA
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January and February (UV index 1).
Average cloud cover
Spencer, IA
The month with the most cloud cover is January (Cloud cover 58).
The month with the least cloud cover is July (Cloud cover 30).
Average visibility
Spencer, IA
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
