Historical weather data, all-time temperature records, and monthly climate averages for Siloam Springs, AR. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 5th in Siloam Springs sits right in that transitional sweet spot — expect a high around 67° and a low of 42°, with about a 1-in-3 chance of rain. The date has seen some wild swings over 127 years, from a scorching 85° in 1954 down to a brutal 23° in 1945. Snow is technically possible but nearly unheard of, with just a 1% chance.
Siloam Springs doesn't mess around at the extremes — its all-time record high of 114° in July 1936 and all-time low of -29° in February 1905 give it a 143-degree range of recorded temperatures. On the wet side, a single October day in 2019 dumped 8.42 inches of rain, and a February 2011 snowstorm buried the area under 17 inches in one shot.
Summer is the dominant season here — highs climb into the 90s from late June through August, peaking around 92° the third week of July. If you're avoiding the heat, January through February is your window, with highs hovering in the upper 40s to low 50s. Rain is spread fairly evenly year-round, but early May is the wettest stretch, averaging nearly 1.4 inches in a single week.