NATIONAL
WEATHER SUMMARY
AUGUST 2025
3-9: Large sections of the country, including the mid-South,
Northeast, and southeastern half of the Corn Belt, experienced mostly dry
weather. Dry conditions extended into the West, except across the northern tier
of the region. Southwestern dryness was related to the temporary disruption of
the monsoon circulation.
Persistent Southeastern cloudiness and showers held weekly
temperatures 5 to IO O F below normal from central Georgia into the
Carolinas. Cool, dry weather prevailed in the northern mid-Atlantic States.
Elsewhere, extreme heat was limited to the southwestern and southcentral U.S.,
despite pervasive dryness. Temperatures averaging at least 5 0 F
below normal were common across the interior Northwest. Farther south and east,
however, near- or above-normal temperatures stretched from the Southwest into
the Great Lakes States. Readings averaged more than 5 0 F above
normal in portions of the upper Great Lakes region, along with numerous
locations in Arizona and New Mexico. Temperatures remained below 95 0
F all week in the Midwest, minimizing heat stress in key corn and soybean
production areas. Early-August heat was focused across the south-central U.S.,
where dailyrecord highs included 105 0 F (on August 3) in McAllen and
105 0 F (on August 4) in Midland. farther north, however, Rawlins,
WY, posted a daily record low (40 0 F) for August 3. Cloudy, rainy
weather in the central and southern Appalachians kept maximum temperatures below
the 70-degree mark on August 3 in Asheville, NC (65 0 F), and
Bluefield, WV (67 0 F). Greenville-Spartanburg, SC, achieved the same
feat on August 4 and 5, with respective highs of 67 and 68 0 F.
During the mid- to late-week period, Southwestern temperatures soared. Phoenix,
AZ, reached 110 0 F or higher each day from July 27 - August 9, a
span cf 14 days, with daily-record highs (116 and 118 0 F,
respectively) occurring on August 6 and 7
Elsewhere on the 7th, daily record highs soared to 119
0 F in California locations such as Needles, Palm Springs, and Indio. Late
in the week, heat intensified across the central and southern Plains, where
record-setting highs for August 8 rose to 106 0 F in Borger and
Dalhart, TX. Heat also lingered across parts of Florida, where Tampa notched a
daily record high of 98 0 F on August 7. Meanwhile, in Oregon, daily
record lows for August 8 dipped to 32 0 F in Burns and 36 0
F in Redmond.
10-16: Near- or above normal temperatures dominated the
country, although unusually hot conditions were largely limited to the Pacific
Northwest and an area stretching from the midSouth into the Northeast. Weekly
temperatures averaged at least 5 0 F above normal from the Ozark
Plateau and the northern Mississippi Delta into the Northeast, including much of
the Ohio Valley and lower Great Lakes region. Readings also averaged more than 5
0 F above normal in parts of the Pacific Northwest. Midwestern
temperatures remained below 95 0 F ail week, aside from a few
locations in the southern Corn Belt. Most Midwestern corn and soybeans have
received adequate moisture and have not experienced a protracted period of heat
during the 2025 growing season, leading to expectations for record-high yields
for both crops. During the first half of the week, notably high temperatures
were observed in the Northeast and Northwest. On August 10-11, Roseburg, OR,
opened the week with consecutive daily-record highs (103 and 105 0 F,
respectively). Similarly, Caribou, ME i collected a trio of daily-record highs
(94 0 F each day) from August 11-13. Elsewhere in
Maine, record-setting highs for August 11 included 98 0
F in Augusta and 97 O F in Millinocket. In Vermont, Burlington
logged a daily-record high of 98 0 F on August 12. Meanwhile, extreme
heat lingered in the Desert Southwest, where Needles, CA, netted a daily-record
high of 118 0 F on August 11. By mid-week, Western heat began to
spread eastward, with August 13 featuring a daily-record high of 102 0
F in Salt Lake City, UT. By August 14, tripledigit heat expanded as far
north as western South Dakota, where Rapid City notched a daily:record high of
100 0 F. Heat persisted for several days on the southern High Plains,
with Dalhart, TX, achieving consecutive daily-record highs (104 and 100 0
F, respectively) on August 14-15. Late-week heat also gripped Florida,
where Winter Haven closed with week on August 15-16 with a pair of daily-record
highs (99 and 97 O F, respectively). Winter Haven's highest-ever
August temperature was record in 1979, with a high of 100 0 F on
August 1.
17-23: In the West, hot, mostly dry weather favored crop
maturation and fieldwork, including Northwestern small grain harvesting. Weekly
temperatures averaged at least 5 0 F above normal in several regions,
including portions of the Rockies, Great Basin, Intermountain West, northern and
central Plains, and mid-South. In contrast, chilly conditions in the northern
Atlantic States held temperatures as much as 5 0 F below normal from
Delaware to Maine. Early in the week, unusually cool air settled across New
England, where daily-record lows for August 18 dipped to 39 0 F in
Houlton, ME, and 41 0 F in
Montpelier, VT. In contrast, heat in the Gulf Coast States
resulted in daily record highs for August 17 in Vicksburg, MS (101 0
F), and New Orleans, LA (99 0 F). On August 18 in Florida,
daily-record highs climbed to 98 0 F in Punta Gorda and Winter Haven.
Triple-digit, dailyrecord highs for August 19 included 102 O F in
Greenwood, MS, and 101 0 F in Memphis, TN. The 19th marked the last
of four consecutive triple-digit readings in Greenwood and three in
Memphis. During the mid- to late week period, the focus for
extreme heat shifted into the
West. August 19 featured triple-digit, daily-record highs in
locations such as Miles City, MT (102 0 F); Salt Lake City, UT (101
0 F); and Sheridan, WY (IOI O F). Greybull, WY, posted a
pair of daily-record highs on August 19 and 20, reaching 101 0 F both
days. From August 20-22, Grand Junction, CO, tallied a trio of daily-record
highs (100, 103, and 100 0 F). Heat briefly extended as far east as
the northern Plains, where Dickinson, ND, attained 99 0 F on August
20, a record for the date. Late in the week, heat intensified in the Desert
Southwest and the Pacific Coast States. On August 21, Needles, CA, logged a
daily-record high of 117 0 F.
Elsewhere in California, daily record highs for August 22
included 124 0 F in Death Valley, 11 O O F in Woodland
Hills, and 106 0 F in Lancaster. Triple digit, daily-record highs
were also reported on August 22 in Northwestern locations such as Portland, OR
(102 0 F), and Dallesport, WA (100 0 F). From August
22-24, Roseburg, OR, reported three consecutive daily-record highs (101, 102,
and 100 0 F). On August 22-23, the week ended with consecutive
daily-record highs in Vancouver, WA (100 0 F both days), and Eugene,
OR (99 0 F bo!h days).
24-30: Short-term dryness intensified across the southern
Corn Belt, especially from Missouri to Ohio, with some negative impacts on
pastures, immature summer crops, and surface water availability. Dryness
extended into other regions, including the northern Mississippi Delta and large
sections of the Tennessee Valley and middle Atlantic States.
Weekly temperatures averaged 5 to IO O
F above normal from the Pacific Northwest— excluding coastal locations—to
the northernmost Rockies. In contrast, chilly conditions covered much of the
central and eastern U.S., with temperatures averaging as much as IO O
F below normal in portions of Kansas and Oklahoma, as well as an area stretching
from the Ohio Valley into the lower Great Lakes region. Temperatures remained
below 80 0 F all week on the Plains as far south as central Kansas,
Readings also failed to reach 80 0 F in much of the Great Lakes
region, including nearly all of Michigan and Wisconsin. For much of the week,
ongoing Northwestern heat resulted in numerous records. In western
Washington, Olympia posted four consecutive daily-record
highs (91, 93, 95, and 92 0 F) from August 22 25. Yakima, WA,
attained 100 0 F on August 25, tying a record for the date. Other
triple-digit, daily-record highs in Washington on August 25 included 102 0
F in Ephrata and 101 0 F in Wenatchee. Hot weather also
persisted in southern Florida, where recordsetting highs for August 26 reached
96 0 F in West Palm Beach and 94 0 F in Miami. West Palm
Beach also closed the month on August 30-31 with a pair of daily-record highs
(95 and
96 0 F, respectively). The monthly average temperature of 85.6 0
F (2.4 0 F above normal) in West Palm Beach tied an August
record originally set in 2022. Late in the week, resurgent heqt along the
Pacific Coast led to daily-record highs in California locations such as San
Diego (88 0 F on August 29) and San Rafael (100 0 F on
August 30). In contrast, a long-lasting surge of cool air chilled the Midwest,
Northeast, and—eventually—the Southeast. By August 25, daily-record lows dipped
to 42 O F in Sisseton, SD, and 44 0 F in Sioux City, IA.
Midwestern daily-record lows for August 26 included 44 0 F in
Springfield, IL, and Ottumwa, IA. St. Joseph, MO, logged a pair of daily-record
lows (49 and 45 0 F, respectively) on August 25-26. Similarly,
Paducah, KY, posted consecutive record setting lows (49 and 48 0 F,
respectively) on August 26-27. In the Great Lakes States, daily-record lows
dipped below the 40-degree mark in a few locations, including Gaylord, MI (39
0 F on August 27), and Glens Falls, NY (38 0 F on August
28).
Jim G. Munley, jr.
http://www.jimmunleywx.com