Climate and monthly weather forecast
Norman, OK

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The colorful blossom of tulips, redbuds, and plums in a garden on the campus of the University of Oklahoma, Norman
The colorful blossom of tulips, redbuds, and plums in a garden on the campus of the University of Oklahoma, Norman

The climate of Norman

Renowned as a city with a 'Humid subtropical, no dry season' climate, Norman is classified as Cfa according to the Köppen climate classification system. Geographically positioned in the heartland of the United States, in Oklahoma, the city exhibits a range of temperatures coupled with a significant amount of annual rainfall.

Over the year, temperature highs in Norman fluctuate from around 49.1°F (9.5°C) in January reaching a peak at 93.6°F (34.2°C) in July. Correspondingly, the lowest temperatures waver from 32.4°F (0.2°C) in January soaring to 72.9°F (22.7°C) in July. A clear variety in Norman's temperatures is observed, indicating a variation through distinct seasons.

Average relative humidity levels from 60% to 75% further solidify the 'Humid subtropical' classification. Rainfall trends exhibit a general year-round presence, introducing the brunt of moisture from April to September, reaching a zenith of 3.86" (98mm) in May. Concurrently, snowfall, another crucial climate characteristic, is minimal, peaking at a scant 1.3" (33mm) in February.

Strong winds whip through Norman, averaging between 8.4mph (13.5km/h) and 12mph (19.3km/h), with gusts reaching up to 18.4mph (29.6km/h). This is accompanied by good visibility of around six miles across the whole year, with sunshine hours stretching from 6 hours in December to an indulgent 11.1 hours in July.

The best time to visit Norman

Norman offers a delightful climate for tourism between April and June. Why so? This period marks the end of winter, offering pleasant temperatures ranging from 63°F (17.2°C) to 88.3°F (31.3°C). The abundant rainfall during this period keeps the surroundings fresh and vibrant - Average rainfall hovers around 2.17" (55mm) to 3.86" (98mm) during these months. Effulgence of sunshine is also at its high with 8.5 hours in April escalating to 10.9 hours per day by June paving the way for productive exploration and activities.

The worst time to visit Norman

Whilst Norman boasts a charming overall climate, the months from July through August prove more challenging for tourism. These months register the height of summer heat with temperatures soaring to 93.2°F (34°C) to 93.6°F (34.2°C) range. Albeit the city experiences rainfall between 2.36" (60mm) to 2.48" (63mm), the high temperatures may have a major impact on outdoor activities, making these months slightly less comfortable for sightseeing and exploration.

Spring weather in Norman

Spring arrives in Norman with gradually increasing temperatures, starting from 49.1°F (9.5°C) in March and climbing up to 77.7°F (25.4°C) in May. A notable increase in rainfall is observed during these months, with figures soaring from 1.14" (29mm) to 3.86" (98mm), marking the commencement of the city’s wettest period. The hours of daylight also increase substantially from 10.1 hours to 14 hours, paired with a considerable enhancement in sunshine hours, paving the way for the vibrant ambiance of spring.

Summer weather in Norman

Norman experiences its warmest months from June to August. During this time, temperatures frequently climb to a sizzling zenith of 88.3°F (31.3°C) to 93.6°F (34.2°C). Despite this, Norman is not devoid of rainfall. Recorded figures display moderate to high precipitation during this period, between 2.17" (55mm) to 2.48" (63mm), producing a unique blend of heat and moisture.

Autumn weather in Norman

The arrival of September in Norman heralds the onset of Autumn. A notable change is felt in the climate as temperatures begin to drop, moving from 84.6°F (29.2°C) in September to 71.6°F (22°C) by November. Rainfall begins to decrease, falling from a high of 2.76" (70mm) in September to 1.06" (27mm) in November. Despite the drop in temperatures, the city receives ample sunshine, ensuring daylight hours remain between 10.3 hours to 12.4 hours during these months.

Winter weather in Norman

Winter in Norman stretches from December to February, bringing with it a crisp chill with temperatures hitting a low of 32.4°F (0.2°C) in January. However, the temperatures gradually increase, reaching up to 52.2°F (11.2°C) by February. Rainfall steadily drops to between 1.06" (27mm) to 1.1" (28mm), with December and February experiencing meager amounts of snowfall. Despite the lowered temperatures, Norman receives sunshine for around 6 hours per day, providing a respite from the cold weather.

Weather in January

The month of January in Norman, Oklahoma often ushers in the chill of winter, with average low temperatures dipping to 32.4°F (0.2°C). The start of the year features occasional snowfall, with an average of 0.75" (19mm) of snow. Weather in January »

Weather in February

In February, Norman experiences a shift in weather patterns, particularly visible in the gradual rise of temperature levels. The average high temperature moves up slightly to 52.2°F (11.2°C) from January's chill. In February, the city sees dampness with 1.06" (27mm) of rainfall spread across an average of 7.2 days. Weather in February »

Weather in March

As Norman transitions into spring during March, the weather often shows dramatic changes. At this time, residents see the welcome rise in average temperature maxima to 63°F (17.2°C). March also brings a substantial amount of precipitation with 1.85" (47mm) of average rainfall, recorded over an expected ten days. Weather in March »

Weather in April

The full bloom of spring can be witnessed in April in Norman. The month witnesses substantial months as the temperature maxima average at 70.9°F (21.6°C), which is quite a leap from March. The change in weather is equally noticeable in terms of rainfall, with 2.52" (64mm) recorded across about 12 days. Weather in April »

Weather in May

May brings a shift from the moderate spring temperatures to the beginnings of summer heat in Norman. There is a notable jump in temperatures, with the maxima averaging around 77.7°F (25.4°C). May typically experiences the highest rainfall across the year, with an average precipitation of 3.86" (98mm). Weather in May »

Weather in June

Summer officially sets in Norman during June, reflecting the classic characteristics of the season. June’s weather sees a significant increase in temperatures, with maxima soaring to an average of 88.3°F (31.3°C). The rainfall drops to 2.17" (55mm), reflecting a decrease from May's high rainfall figures. Weather in June »

Weather in July

July stands out as the hottest month in Norman, embodying the peak of summer. The highest average temperature generally rises to a soaring 93.6°F (34.2°C). The average precipitation stabilizes at 2.36" (60mm), making it mildly wetter than June. Weather in July »

Weather in August

August, being one of the final summer months in Norman, echoes the scorching July heat with the temperature maxima averaging at 93.2°F (34°C). With an average precipitation of 2.48" (63mm), there is a slight uptick from July, making August a bit wetter. Weather in August »

Weather in September

In September, Norman begins to transition from summer towards the milder autumn. The weather shows a moderate decrease with average temperature maxima dropping to 84.6°F (29.2°C). Rainfall peaks again with an average of 2.76" (70mm) across the month. Weather in September »

Weather in October

The month of October in Norman brings noticeably cooler weather along with the vibrant fall colors. As compared to September, the average temperature tops dip significantly to around 71.6°F (22°C). Rainfall reduces from September, averaging at 2.44" (62mm) spanning over approximately ten days. Weather in October »

Weather in November

November typically marks the prelude of winter in Norman. The cool autumn weather takes a decisively cold turn, with the lowest average temperature falling to 42.8°F (6°C). November is relatively drier with an average rainfall of 1.06" (27mm). Weather in November »

Weather in December

December, the final month of the year, sets in the full winter season in Norman. The temperature hits annual lows with averages hovering around 49.5°F (9.7°C). December witnesses a mild increase in snowfall, with an average deposit of 0.79" (20mm). Weather in December »

Frequently asked questions

What are the coldest months?

In Norman, January is known for its average lowest temperatures, reaching a high of 49.1°F (9.5°C) and a low of 32.4°F (0.2°C).

How much does it rain?

In Norman, during the entire year, the rain falls for 121.1 days and collects up to 24.8" (630mm) of precipitation.

When does it snow?

Months with snowfall are January through March, November and December.

How much does it snow?

In Norman, during the entire year, snow falls for 6.9 days and aggregates up to 3.19" (81mm) of snow.

What is the driest month?

The months with the least rainfall are February and November Rain falls for 7.2 days and accumulates 1.06" (27mm) of rain.

When does it snow the most?

February is the month with the most snowfall. Snow falls for 2.2 days and accumulates 1.3" (33mm) of snow.

When is Daylight Saving Time (DST)?

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.

When it does not snow in Norman?

April through October are months without snowfall.

What is the most humid month?

May is the most humid month, with an average relative humidity of 75%.

What is the wettest month?

May is the month with the most rainfall. Rain falls for 15.3 days and accumulates 3.86" (98mm) of precipitation.

When are the longest days?

The month with the longest days is June, with an average of 14h and 30min of daylight.

When is the highest UV index?

June through August, with an average maximum UV index of 7, are months with the highest UV index.

What is the hottest time of year?

Norman notes the warmest temperatures in July, with a average high of 93.6°F (34.2°C) and a low of 72.9°F (22.7°C).

What month has the most sunshine?

July has the most sunshine of the year, with an average of 11.1h of sunshine.

What is the least humid month?

With an average relative humidity of 60%, August is the least humid month.

What is the month with the shortest days?

With an average of 9h and 48min of daylight, December has the shortest days of the year.

What is the month with the least sunshine?

The month with the least sunshine is December, with an average of 6h of sunshine.

What is the month with the lowest UV index?

December is the month with the lowest UV index, with an average maximum UV index of 2.

Average temperature
Norman, OK

Average temperature - Norman, OK

The warmest month (with the highest average high temperature) is July (93.6°F).
The month with the lowest average high temperature is January (49.1°F).

The month with the highest average low temperature is July (72.9°F).
The coldest month (with the lowest average low temperature) is January (32.4°F).

Average pressure
Norman, OK

Average pressure - Norman, OK

The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).

Average wind speed
Norman, OK

Average wind speed - Norman, OK

The windiest month (with the highest average wind speed) is April (12mph).
The calmest month (with the lowest average wind speed) is August (8.3mph).

Average rainfall
Norman, OK

Average rainfall - Norman, OK

The wettest month (with the highest rainfall) is May (3.86").
The driest months (with the least rainfall) are February and November (1.06").

Average rainfall days
Norman, OK

Average rainfall days - Norman, OK

The month with the highest number of rainy days is May (15.3 days).
The month with the least rainy days is January (4.8 days).

Average snowfall
Norman, OK

Average snowfall - Norman, OK

The month with the highest snowfall is February (1.3").
The months with the least snowfall are April, May, June, July, August, September and October (0").

Average snowfall days
Norman, OK

Average snowfall days - Norman, OK

The month with the highest number of snowfall days is February (2.2 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

Average daylight / Average sunshine
Norman, OK

Average daylight / Average sunshine - Norman, OK

The month with the longest days is June (Average daylight: 14h and 30min).
The month with the shortest days is December (Average daylight: 9h and 48min).

The month with the most sunshine is July (Average sunshine: 11h and 6min).
The month with the least sunshine is December (Average sunshine: 6h and 0min).

Average sunshine days
Norman, OK

Average sunshine days - Norman, OK

The month with the most sunshine days is January (24.2 days).
The month with the least sunshine days is May (13.8 days).

Average visibility
Norman, OK

Average visibility - Norman, OK

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).

Norman, Oklahoma, USA

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