News

Williams Weather Window – Simpson County, Mississippi


By Chief Meteorologist Paul Williams


Monday, July 27 through Monday, August 3, 2026
Simpson County begins the week under another stretch of dangerous midsummer heat before a more active weather pattern develops later this week.


Afternoon temperatures will climb into the upper 90s through midweek. Combined with high humidity, heat index values will range between 105 and 111 degrees at times. Residents should limit strenuous outdoor activity during peak afternoon hours, stay hydrated, and check on elderly neighbors and anyone without reliable air conditioning. An Extreme Heat Warning is in effect for Tuesday, highlighting the increased risk of heat-related illness.


By Wednesday, scattered afternoon and evening thunderstorms return to the forecast. Storm coverage becomes more widespread Thursday through the weekend as deep Gulf moisture moves into the region. While not everyone will see rain each day, storms may produce brief heavy downpours, gusty winds, frequent lightning, and localized ponding on roadways.


Temperatures will ease slightly by the weekend, with highs dropping into the lower 90s and even upper 80s by Sunday as cloud cover and storm chances increase.


Day-by-Day Forecast


Monday: Mostly sunny and very hot. High near 98.


Tuesday: Hottest day of the week. High around 99 with dangerous heat indices.


Wednesday: Hot with scattered afternoon thunderstorms. High near 97.


Thursday: More numerous afternoon storms. High near 95.


Friday: Partly sunny with scattered thunderstorms. High near 92.


Saturday: Morning storms possible, then partly sunny. High near 95.


Sunday: Mostly cloudy with scattered thunderstorms. High near 89.


Monday: Mostly cloudy with scattered showers and storms. High near 91.


Weather Headlines


Heat: The primary concern through midweek. Stay hydrated, wear light-colored clothing, and never leave children or pets in vehicles.


UV Index: Very high to extreme (10–11+) on sunny afternoons through midweek. Use sunscreen, hats, and take shade breaks.


Air Quality/Pollen: Summer grasses and mold spores may increase after storms, potentially affecting allergy sufferers.


Tropics: The National Hurricane Center continues monitoring the Gulf following Tropical Storm Bertha. No direct impacts are expected for Simpson County at this time, but increased tropical moisture could enhance rainfall along parts of the Gulf Coast later this week.


Bottom Line: Expect several more days of dangerous heat, followed by increasing chances of showers and thunderstorms later this week. The safest times for outdoor activity will be early morning and near sunset.

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