Lamar braces for 104-degree heat Wednesday before storms bring a weekend cooldown
Lamar endures one more scorcher Wednesday, with a high near 104, before monsoon moisture spreads across southeast Colorado and drops Prowers County temperatures into the low 90s and upper 80s with nightly shower chances through the weekend, according to the National Weather Service in Pueblo.
Wednesday is sunny and hot with a high near 104 and only a 10 percent chance of showers and thunderstorms after 5 p.m. West winds of 5 to 10 mph become south-southeast at 10 to 15 mph in the afternoon. Wednesday night turns breezy, with south winds of 15 to 20 mph shifting northwest after midnight, a 20 percent chance of storms before 10 p.m., and a low around 65.
“Cooling trend to at and slightly below seasonal temperatures into the weekend, along with widespread coverage of daily storms leading to increasing flash flooding concerns,” a meteorologist with the National Weather Service in Pueblo wrote in Tuesday’s Area Forecast Discussion.
Monsoon moisture breaks the heat
Forecasters say an upper-level high will slide into the southern High Plains through the week while moisture-laden southwest flow — a classic monsoon setup — spreads over Colorado. A front crossing the plains Thursday adds upslope flow, pulling temperatures down toward seasonal levels by the weekend with daily rounds of showers and thunderstorms.
No fire weather warnings were in effect for Prowers County as of Tuesday afternoon, and the incoming moisture should ease fire concerns after a hot, dry start to the week. The Pueblo office cautioned that flash flooding becomes an increasing concern late in the week, particularly near recent burn scars, and said flash flood watches will likely be needed beginning Thursday.
Lamar, Colo. — Five-day forecast (Aug. 12-16, 2026)
Source: National Weather Service, Pueblo, Colo. — Issued Aug. 11, 2026
| Period | Sky Conditions | High/Low | Wind |
|---|---|---|---|
| Wednesday | Sunny and hot; 10% storms after 5 p.m. | High 104 | W 5-10 mph, becoming SSE 10-15 mph in the afternoon |
| Wednesday Night | Mostly cloudy, then clearing; 20% storms before 10 p.m.; breezy | Low 65 | S 15-20 mph, becoming NW 5-10 mph after midnight |
| Thursday | Sunny; 20% storms after noon | High 96 | NW around 10 mph, becoming E in the afternoon |
| Thursday Night | Mostly cloudy; showers likely (60%) | Low 63 | E 5-10 mph, becoming N after midnight |
| Friday | Mostly sunny; 10% storms after noon | High 93 | N 5-10 mph, becoming SE in the afternoon |
| Friday Night | Mostly cloudy; showers likely (70%) | Low 62 | SSE 5-10 mph, becoming ENE after midnight |
| Saturday | Mostly sunny; 10% storms after noon | High 90 | WNW around 5 mph, becoming S in the afternoon |
| Saturday Night | Mostly cloudy; showers likely (70%) | Low 62 | SE 5-10 mph |
| Sunday | Mostly sunny | High 89 | ENE 5-10 mph |
| Sunday Night | Mostly cloudy; showers likely | Low 61 | SE 5-10 mph |
(Kiowa County Press)
Thursday and Friday
Thursday stays warm but noticeably less extreme, sunny with a high near 96 and a 20 percent chance of afternoon showers and thunderstorms. Showers become likely Thursday night before midnight, a 60 percent chance, with a low around 63.
Friday is mostly sunny with a high near 93 and a 10 percent chance of afternoon storms. Showers are likely again Friday night, a 70 percent chance, under mostly cloudy skies with a low around 62.
Extended outlook: Saturday and Sunday
Saturday is mostly sunny with a high near 90 and a 10 percent chance of afternoon storms, with showers likely Saturday night and a low around 62. Sunday is mostly sunny with a high near 89, and showers are likely once more Sunday night with a low around 61.
Ahead of Wednesday’s heat, residents should limit strenuous outdoor activity during the afternoon, drink plenty of water and check on neighbors without air conditioning. As rain chances climb late in the week, avoid driving through flooded roadways.
