Climate Insights for Lamar

Walla Walla County, Arkansas, United States

Hottest
July
31°C peak
Coldest
January
0°C low
Wettest
May
179mm rain
Best to Visit
June, September
Mild temps & low rain

Climate Overview

The climate in Lamar is temperate. The average annual temperature is 16°C and approximately 1413mm of precipitation falls per year. Lamar receives a notable amount of rainfall throughout the year, including during its driest month. Lamar is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: July, August, June. The coldest months are January, December, February, when temperatures can drop to 0°C. Light snow can occur between January and December.

Temperature

10° 20° 30° 40° Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Max: 9° Average: 4° Min: 0° Feb Max: 13° Average: 7° Min: 3° Mar Max: 17° Average: 11° Min: 6° Apr Max: 21° Average: 15° Min: 10° May Max: 25° Average: 20° Min: 15° Jun Max: 30° Average: 25° Min: 20° Jul Max: 31° Average: 26° Min: 22° Aug Max: 30° Average: 25° Min: 21° Sep Max: 29° Average: 23° Min: 18° Oct Max: 22° Average: 16° Min: 11° Nov Max: 16° Average: 10° Min: 5° Dec Max: 11° Average: 5° Min: 1°
Max
Average
Min

Temperatures in Lamar vary considerably across the year, with a 31°C difference between the coldest and warmest months. The warmest month is July, when average highs reach 31°C and the mean temperature sits around 26°C. The coldest month is January, when overnight lows fall to 0°C and the daily average is 4°C. On average, daily temperatures fluctuate by about 10°C between overnight lows and afternoon highs. The sharpest temperature change occurs between September and October, with a 7°C shift in average temperatures.

Precipitation

0mm 50mm 100mm 150mm 200mm Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Precipitation: 90mm Snow: 3mm Feb Precipitation: 138mm Snow: 2mm Mar Precipitation: 161mm Snow: 1mm Apr Precipitation: 168mm Snow: 0mm May Precipitation: 179mm Snow: 0mm Jun Precipitation: 95mm Snow: 0mm Jul Precipitation: 93mm Snow: 0mm Aug Precipitation: 125mm Snow: 0mm Sep Precipitation: 71mm Snow: 0mm Oct Precipitation: 102mm Snow: 0mm Nov Precipitation: 94mm Snow: 0mm Dec Precipitation: 96mm Snow: 3mm
Precipitation
Snow

Lamar is a fairly wet location, receiving approximately 1413mm of precipitation annually, which averages out to around 118mm per month. The wettest month is May, averaging 179mm of rainfall. April and March also tend to see above-average precipitation. The driest month is September, with just 71mm. That's 108mm less than May, the wettest month. Precipitation varies noticeably between seasons, with the first half (January to June) of the year generally seeing more rainfall. Light snowfall can occur between January and December, totalling around 9cm annually. December is the snowiest month with approximately 3cm.

Wind

0km/h 5km/h Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Wind Speed: 3km/h Feb Wind Speed: 3km/h Mar Wind Speed: 3km/h Apr Wind Speed: 3km/h May Wind Speed: 3km/h Jun Wind Speed: 2km/h Jul Wind Speed: 2km/h Aug Wind Speed: 2km/h Sep Wind Speed: 2km/h Oct Wind Speed: 3km/h Nov Wind Speed: 3km/h Dec Wind Speed: 3km/h
Wind Speed

Lamar is relatively calm, with an average annual wind speed of 3km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is March, averaging 3km/h, though still comfortable for most outdoor activities. The calmest conditions occur in July, with average winds dropping to 2km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 1km/h gap between the calmest and windiest months.

Seasons

Winter
Dec 21
Spring
Mar 20
Summer
Jun 21
Autumn
Sep 23

93 days until Autumn

It is currently summer in Lamar, which began on June 21, 2026. Lamar is in the Northern Hemisphere, where spring begins in March, summer in June, autumn in September, and winter in December. The warmest period peaks in July at around 31°C, while the coldest stretch bottoms out in January near 0°C. Autumn is next, beginning on September 23, 2026 — 93 days from now.

Spring

Temperatures range from 6 to 25°C. Rainfall is heavy, totalling around 508mm across the season with a monthly average of 169mm. Winds are generally light, averaging 3km/h. An umbrella or waterproof jacket is advisable as spring showers are frequent.

Summer

Temperatures range from 20 to 31°C. Rainfall is heavy, totalling around 313mm across the season with a monthly average of 104mm. Winds are generally light, averaging 2km/h. Light, breathable clothing is ideal — perfect conditions for outdoor activities.

Autumn

Temperatures range from 5 to 29°C. Precipitation is moderate at around 268mm for the season, averaging 89mm per month. Winds are generally light, averaging 2km/h. A waterproof jacket and sturdy footwear are recommended as rain becomes more frequent.

Winter

Temperatures range from 0 to 13°C. Rainfall is heavy, totalling around 323mm across the season with a monthly average of 108mm. Expect around 8cm of snow accumulation during this period. Winds are generally light, averaging 3km/h. A light jacket or sweater is usually sufficient, though cooler evenings may call for an extra layer.

Best Time to Visit

Jan
Feb
Mar 11°
Apr 15°
May 20°
Jun 25°
Jul 26°
Aug 25°
Sep 23°
Oct 16°
Nov 10°
Dec

The best time to visit Lamar is during June and September, when the weather is most comfortable for travellers. During these months, average temperatures hover around 24°C with modest rainfall averaging 83mm per month. By contrast, July can be uncomfortably hot with highs reaching 31°C, while January is the coldest period with lows dropping to 0°C. Despite being the best months overall, some rain is still likely — pack a waterproof layer and plan a mix of indoor and outdoor activities.

Monthly Climate Data

The table below shows monthly climate averages for Lamar based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Celsius (°C). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Snow is measured in centimetres (cm) and reflects average monthly snowfall accumulation. Wind speed is the average sustained speed in kilometres per hour (km/h). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.

Month
Min Temperature
Max Temperature
Wind Speed
Precipitation
Snow
Jan
0 °C
9 °C
3 km/h
90 mm
3 cm
Feb
3 °C
13 °C
3 km/h
138 mm
2 cm
Mar
6 °C
17 °C
3 km/h
161 mm
1 cm
Apr
10 °C
21 °C
3 km/h
168 mm
0 cm
May
15 °C
25 °C
3 km/h
179 mm
0 cm
Jun Current
20 °C
30 °C
2 km/h
95 mm
0 cm
Jul
22 °C
31 °C
2 km/h
93 mm
0 cm
Aug
21 °C
30 °C
2 km/h
125 mm
0 cm
Sep
18 °C
29 °C
2 km/h
71 mm
0 cm
Oct
11 °C
22 °C
3 km/h
102 mm
0 cm
Nov
5 °C
16 °C
3 km/h
94 mm
0 cm
Dec
1 °C
11 °C
3 km/h
96 mm
3 cm
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