Long-Range Weather Predictions for September 2016

September Weather Forecasts

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Here is our September monthly snapshot of the U.S. and Canadian Weather forecasts. 

Keep in mind that the forecasts presented below are based on “long-range” weather predictions, which means that they were created many months ago to help gardeners, travelers, and weather watchers plan ahead. See how The Old Farmer’s Almanac predicts the weather.

So, we would advise treating long-range predictions as you might trends, giving you a general sense of typical weather and how much the season might deviate from normal. Weather patterns can shift by a week and unexpected dynamics can occur. Ever year is different! That said, The Old Farmer’s Almanac is traditionally 80% accurate, having predicted weather since George Washington’s days as president.

Find next month’ free long-range forecast here.

For short-term weather forecasts, you can always find our 7-day forecasts here.

September Long-Range Weather Forecast for the United States

us_weather_june_2016_full_width.png

Region 1: Northeast

Temp. 62° (3° above avg.); precip. 3.5” (0.5” below avg.). 1–5 Sunny, warm. 6–9 Tropical storm threat. 10–21 Showers, then sunny, chilly. 22–30 A few showers, mild.

Region 2: Atlantic Corridor

Temp. 70° (3° above avg.); precip. 4.5” (1” above avg.). 1–3 Sunny, turning cooler. 4–8 Tropical rains. 9–14 Scattered t-storms, warm. 15–22 Sunny; cool, then warm. 23–30 Scattered t-storms, turning cool.

Region 3: Appalachians 

Temp. 67° (3° above avg.); precip. 3.5” (avg.). 1–3 Sunny, hot. 4–8 T-storms, then sunny, warm. 9–14 Scattered t-storms, warm. 15–18 Sunny, cool. 19–23 Showers, then sunny, warm. 24–30 Scattered showers, warm.

Region 4: Southeast

Temp. 76° (2° above avg.); precip. 4” (2” above avg. north, 3” below south). 1–5 Sunny, then t-storms, warm. 6–9 Sunny, nice. 10–15 Scattered t-storms, warm. 16–22 Sunny, warm. 23–25 Hurricane threat. 26–30 Sunny, warm.

Region 5: Florida

Temp. 81° (1° above avg.); precip. 3.5” (2” below avg.). 1–5 Daily t-storms, seasonable. 6–13 Isolated t-storms; cool, then hot. 14–17 T-storms, warm. 18–28 Sunny north, a few t-storms south and central; warm. 29–30 T-storms, hot.

Region 6: Lower Lakes

Temp. 65° (3° above avg.); precip. 2.5” (1” below avg.). 1–3 Sunny, warm. 4–11 T-storms, then sunny, cool. 12–19 Showers, cool. 20–25 Sunny, quite warm. 26–30 Showers, turning cool.

Region 7: Ohio Valley

Temp. 70° (3° above avg.); precip. 3.5” (0.5” above avg.). 1–3 Sunny, hot. 4–13 A few t-storms, warm. 14–17 Sunny, cool. 18–28 Scattered t-storms, warm. 29–30 Showers, cool.

Region 8: Deep South

Temp. 79° (3° above avg.); precip. 5.5” (1” below avg. north, 3” above south). 1–4 Sunny, hot north; t-storms south. 5–9 A few t-storms, hot and humid. 10–13 Hurricane threat. 14–21 Isolated t-storms, turning hot. 22–26 Sunny, hot. 27–30 T-storms, then sunny, cool. 

Region 9: Upper Midwest

Temp. 58° (avg.); precip. 4” (1” above avg.). 1–6 T-storms, then sunny, nice. 7–11 Showers, then sunny, cool. 12–20 Rainy periods, then sunny, mild. 21–26 T-storms, warm. 27–30 Showers, turning cool. 

Region 10: Heartland

Temp. 69° (2° above avg.); precip. 3” (1” below avg. north, avg. south). 1–7 Scattered showers, very warm. 8–13 Heavy rain south, showers north; cool. 14–18 Showers, cool. 19–24 Sunny, very warm. 25–30 T-storms, then sunny, nice.

Region 11: Texas-Oklahoma

Temp. 76° (avg.); precip. 6.5” (1” above avg. north, 5” above south). 1–6 Sunny, hot north; hurricane threat south. 7–9 Sunny north, t-storms south. 10–12 Hurricane threat. 13–15 Sunny, cool. 16–22 Scattered t-storms, warm. 23–30 Isolated t-storms, turning cooler.

Region 12: High Plains

Temp. 59° (2° below avg.); precip. 2.5” (1” above avg.). 1–6 Sunny, warm. 7–16 Rainy periods, chilly. 17–22 Showers, cool north; sunny, warm south. 23–25 Rain and wet snow north, showers south. 26–30 Sunny, mild.

Region 13: Intermountain

Temp. 59° (3° below avg.); precip. 1” (avg.). 1–6 Sunny, warm. 7–17 Scattered showers, cool. 18–22 Showers, cool. 23–25 Rain and snow, chilly. 26–30 Sunny, turning warm.

Region 14: Desert Southwest

Temp. 77° (2° below avg.); precip. 1” (avg.). 1–9 Scattered t-storms, then sunny, warm. 10–15 Scattered t-storms, then sunny, cool. 16–21 T-storms, then sunny, cool. 22–30 Scattered t-storms east, sunny west; cool, then warm. 

Region 15: Pacific Northwest

Temp. 60° (1° below avg.); precip. 1.5” (avg.). 1–8 Showers, then sunny, cool. 9–16 Sunny, nice. 17–23 Rainy periods, cool. 24–28 Sunny, turning warm. 29–30 Showers, mild.

Region 16: Pacific Southwest

Temp. 72° (2° above avg.); precip. 0.2” (avg.). 1–8 Sunny, turning hot. 9–17 Showers, then sunny, cool. 18–25 Scattered showers, cool. 26–30 Sunny; cool north, turning hot south.

Region 17: Alaska

Temp. 32° N, 54° EW (avg.); precip. 1.1” N, 5” S (avg. north, 2” below south). 1–4 Flurries N, showers C+S; cool. 5–13 Snow showers N, a few showers C+S; mild. 14–20 Showers, mild N+C; sunny, cool S. 21–30 Snow showers, cold N+C; rainy periods, cool S. 

KEY: Panhandle (P), Aleutians (A), north (N), central (C), south (S), west-central (WC), east-central (EC), south-central (SC), elsewhere (EW)

Region 18: Hawaii

Temp. 81° (0.5° below avg.); precip. 0.8” (avg.). 1–7 A few showers, warm. 8–12 Showers; cool C+W, warm E. 13–18 A few t-storms, cool. 19–30 Daily light showers C+W, rain and t-storms E; seasonable.

KEY: east (E), central (C), west (W)

 

September Long-Range Weather Forecast: Canada

canadian_weather_june_2016_full_width.png

Region 1: Atlantic Canada

Temp. 15°C (1°C above avg.); precip. 160mm (50mm above avg.). 1–5 Showers, turning warm. 6–9 Tropical storm threat. 10–17 Scattered showers, mild. 18–30 A few showers, cool. 

Region 2: Southern Quebec

Temp. 16°C (2°C above avg.); precip. 80mm (10mm below avg.). 1–5 Scattered showers, warm. 6–13 T-storms, then showers, turning cool. 14–22 Rain, then sunny, nice. 23–27 Rainy, cool east; sunny, warm west. 28–30 Showers, mild.

Region 2: Quebec du Sud

Temp. 16°C (2°C au-dessus de la moy.); précip. 80mm (10mm en-dessous de la moy.). 1–5 Averses éparses, chaud. 6–13 Orages, puis averses, avec refroidissement. 14–22 Pluie, puis ensoleillé, agréable. 23–27 Pluvieux, froid à l’est; ensoleillé, chaud à l’ouest. 28–30 Averses, doux.

Region 3: Southern Ontario

Temp. 16.5°C (2°C above avg.); precip. 50mm (40mm below avg.). 1–9 A few showers, warm. 10–20 Scattered showers, cool. 21–26 T-storms, then sunny, warm. 27–30 Showers, turning cool.

Region 4: The Prairies

Temp. 11°C (avg.); precip. 10mm (30mm below avg.). 1–6 Scattered t-storms, warm. 7–14 A few showers, cool. 15–19 Sunny, warm. 20–22 Showers, cool. 23–26 T-storms east; snow, then sunny, west; turning chilly. 27–30 Showers, warm.

Region 5: Southern British Columbia

Temp. 13°C (1°C below avg.); precip. 115mm (50mm above avg.). 1–7 Showers, cool. 8–16 Sunny, cool. 17–23 Rainy periods, cool. 24–30 A few showers, mild.

Region 6: Yukon

Temp. 7°C (avg.); precip. 20mm (10mm below avg.). 1–9 Showers, cool. 10–19 Scattered showers, mild. 20–24 Rain and snow showers, cold. 25–30 Showers, mild.

Region 7: Northwest Territories

Temp. 5°C (1°C above avg.); precip. 22mm (5mm below avg.). 1–3 Sunny, mild. 4–9 Flurries north; rain, then showers south; seasonable. 10–16 Snowy periods north, showers south; seasonable. 17–20 Sunny, cool. 21–24 Snowy periods; mild north, cold south. 25–30 Flurries, turning cold north; showers, mild south.

Source: 

The 2016 Old Farmer's Almanac

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