Climate and monthly weather forecast
Spencer, IA

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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 »
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Frequently asked questions

What is the coldest time of year in Spencer?

January is the month when Spencer, Iowa, experiences its coldest temperatures, averaging a high of 22.8°F (-5.1°C) and a low of 10.6°F (-11.9°C).

What is the most humid month in Spencer?

With an average relative humidity of 87%, January is the most humid month.

What is the driest month in Spencer?

The month with the least rainfall in Spencer is January, when the rain falls for 3.1 days and typically collects 0.43" (11mm) of precipitation.

How many days does it rain in Spencer?

In Spencer, during the entire year, the rain falls for 112.3 days and collects up to 15.31" (389mm) of precipitation.

When does it snow in Spencer?

Months with snowfall in Spencer are January through May, October through December.

How many days does it snow in Spencer?

In Spencer, Iowa, during the entire year, snow falls for 45.5 days and aggregates up to 11.14" (283mm) of snow.

What is the month with the least sunshine in Spencer?

January has the least sunshine of the year in Spencer, Iowa, with an average of 4h of sunshine.

When is the lowest UV index in Spencer?

The months with the lowest UV index in Spencer are January and February, with an average maximum UV index of 1.

When does it snow the most in Spencer?

The month with the most snowfall in Spencer is February, when snow falls for 9.5 days and typically aggregates up to 2.72" (69mm) of snow.

When is Daylight Saving Time (DST) in Spencer?

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.

What is the wettest month in Spencer?

The month with the most rainfall in Spencer, Iowa, is June, when the rain falls for 15.4 days and typically aggregates up to 2.44" (62mm) of precipitation.

When it does not snow in Spencer?

In Spencer, snow does not fall in June through September.

When are the longest days in Spencer?

The month with the longest days in Spencer, Iowa, is June, with an average of 15h and 18min of daylight.

What is the month with the highest UV index in Spencer?

June and July, with an average maximum UV index of 6, are months with the highest UV index.

What is the hottest time of year in Spencer?

In Spencer, July is identified by the average highest temperatures, reaching a peak of 80.2°F (26.8°C) and a low of 63.1°F (17.3°C).

What month has the most sunshine in Spencer?

With an average of 10.4h of sunshine, July has the most sunshine of the year.

What is the least humid month in Spencer?

With an average relative humidity of 68%, October is the least humid month.

What is the month with the shortest days in Spencer?

December has the shortest days of the year in Spencer, Iowa, with an average of 9h and 6min of daylight.

Average temperature
Spencer, IA

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).

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Average pressure
Spencer, IA

Average pressure - Spencer, IA

The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.87"Hg).

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Average wind speed
Spencer, IA

Average wind speed - Spencer, IA

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).

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Average rainfall
Spencer, IA

Average rainfall - Spencer, IA

The wettest month (with the highest rainfall) is June (2.44").
The driest month (with the least rainfall) is January (0.43").

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Average rainfall days
Spencer, IA

Average rainfall days - Spencer, IA

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).

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Average snowfall
Spencer, IA

Average snowfall - Spencer, IA

The month with the highest snowfall is February (2.72").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days
Spencer, IA

Average snowfall days - Spencer, IA

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).

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Average daylight / Average sunshine
Spencer, IA

Average daylight / Average sunshine - Spencer, IA

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).

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).

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Average sunshine days
Spencer, IA

Average sunshine days - Spencer, IA

The month with the most sunshine days is November (20.1 days).
The month with the least sunshine days is June (10.8 days).

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Average visibility
Spencer, IA

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).

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Spencer, Iowa, USA

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