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FARMERS ALMANAC Long-Range Weather Forecasts
Our long-range weather forecasts are calculated by Caleb Weatherbee by using a proprietary formula developed by Farmers' Almanac founder David Young. This formula considers many factors, such as sunspots, moon phases, and other astronomical and atmospheric signs and conditions. Since 1818, this carefully guarded formula has been passed along from calculator to calculator and has never been revealed.
Unlike your local news, government, or commercial weather service, our forecasts are calculated several years in advance, to allow time for publishing and distribution. Please keep in mind, that after our Almanac is printed, we don't have the option of changing or updating our forecasts, as do other sources daily. Given this, our forecasts understandably must be made somewhat generalized.
Although many longtime Almanac followers claim that our forecasts are 80% to 85% accurate, it should be noted that weather forecasting still remains an inexact science. Therefore, our forecasts may sometimes be imperfect. If you are planning an outdoor event, we recommend that you also check forecasts from local sources.
Northeastern States
As a service to web visitors, we display two months of our zoned weather forecasts. All months can be found in the Farmers' Almanac sold in stores nationwide. Or you can order your copy from our online store
April 2003 1st-3rd. Unsettled. 4th-7th. Sunny, with seasonal day temperatures, and clear, frosty nights. 8th-11th. Wet weather. 12th-15th. Rain/snow New England slowly diminishes. 16th-19th. More rain/ snow showers. 20th-23rd. Showers, thunderstorms into Mid-Atlantic. 24th-27th. Rain/wet snow, especially New England. 28th-30th. Scattered showers, thunderstorms.
May 2003 1st-3rd. Fair skies, seasonable. 4th-7th. Showery rains, thunderstorms. 8th-11th. Partially sunny, showers possible. 12th-15th. Generally fair skies. 16th-19th. Warmer days, mixed clouds, sun. A dry track for the Preakness. 20th-23rd. Warm, humid. 24th-27th. Showers give way to clearing. 28th-31st. Sunshine, then increasingly cloudy skies.
Great Lakes/Midwest
April 2003 1st-3rd. Showers. 4th-7th. Warming east to western Ohio River Valley. Clear skies, frosty nights Great Lakes. 8th-11th. Cold air with frost, clearing skies Great Lakes, Ohio River Valley. 12th-15th. Mixed clouds. 16th-19th. Rain/wet snow showers. 20th-23rd. Cloudy, cool, rainy Great Lakes. Showers, thunderstorms upper Ohio River Valley, points east. 24th-27th. Wet, cold, with showers, some wet snow. 28th-30th. Showers.
May 2003 1st-3rd. Showers, thunderstorms eastern Great Lakes, points south. A showery Derby Day in Louisville. Temperatures heat up. 4th-7th. Rain, thunderstorms. 8th-11th. Changeable: clouds/sun/widely scattered showers. 12th-15th. Slow warming after cool days, scattered showers Great Lakes.16th-19th. Varying amounts of sunshine, fair-weather clouds, warmer. 20th-23rd. Stormy weather. Cooler temperatures by the 23rd. 24th-27th. Showers end, clearing hopefully in time for the Indy 500. 28th-31st. A clash of Pacific and polar air brings heavy thunderstorms to Ohio River Valley, much of Kentucky.
Southeast States
April 2003 1st-3rd. Increasing cloudiness, showers. 4th-7th. Fair and cool. 8th-11th. Scattered showers, thundershowers. 12th-15th. Cooler, after showers pass through region. Showers may interfere with Masters Tournament in Augusta. 16th-19th. Showers, thunderstorms, then clearing, chilly. 20th-23rd. Warm, dry. 24th-27th. Increasingly cloudy. 28th-30th. Showers, thunderstorms push in from the West.
May 2003 1st-3rd. Clear, seasonal temperatures near Atlantic Coast, but thundershowers probable Tennessee, Mississippi, parts of Alabama. 4th-7th. Heavy-to-severe thunderstorms extend from North Carolina south to Florida. 8th-11th. Varying amounts of clouds/sun, risk of a shower. 12th-15th. Mainly clear skies. 16th-19th. Partial sun; warm. 20th-23rd. Muggy, sticky. 24th-27th. Warm, humid, especially Mississippi, Alabama, Georgia, parts of Tennessee. 28th-31st. A clash of Pacific and polar air brings heavy thunderstorms through western Tennessee, upper sections of Mississippi, Alabama. Severe thunderstorms, damaging winds and a tornado danger Gulf Coast.
North Central States
April 2003 1st-3rd. Showers Western Rockies, otherwise, clearing. 4th-7th. Rain/wet snow Northern Rockies. Warm Plains. 8th-11th. Cold air, with frost, clearing Plains. Snow Northern Rockies. 12th-15th. Storm Rockies moves into Great Plains. Really warm air Plains, Central States. 16th-19th. Rain/wet snow. 20th-23rd. Cloudy, cool, with rain Rockies, Northern Plains. Showers, thunderstorms Colorado, points east. 24th-27th. Unsettled, cold Rockies north and east into Northern Plains. 28th-30th. Drier, cold.
May 2003 1st-3rd. Heat building up; dry. 4th-7th. Scattered thunderstorms, then cooling. 8th-11th. Cloudy, showers possible. 12th-15th. Scattered showers. 16th-19th. A blend of sun and clouds, warmer. 20th-23rd. Showery Northern Rockies. 24th-27th. Showers Rockies, points east, quickly clearing. 28th-31st. Showery/thunder, cooler.
South Central States
April 2003 1st-3rd. Showers Western Rockies. Skies clearing elsewhere. 4th-7th. Unsettled Southern Rockies. Warmer Plains. 8th-11th. Cold air, with frost. Clearing Plains. Very warm, then clouds/showers, chillier Southern Rockies. 12th-15th. Stormy Plains. 16th-19th. Showers, thunderstorms move east, then clearing, colder. 20th-23rd. Very warm, mainly dry Southern Rockies, points east to Gulf States. 24th-27th. Very warm air from Plains clashes with cold air from north, generating heavy thunderstorms. 28th-30th. Cold air Texas, then east across Gulf States.
May 2003 1st-3rd. Increasing heat. 4th-7th. Locally heavy thunderstorms Texas move south and east. 8th-11th. Mixed clouds/sun. Possible showers. 12th-15th. Showers, then clearing, warmer. 16th-19th. Showers, thunderstorms Southern Plains. 20th-23rd. Hot, dry Southern Rockies. 24th-27th. Warm, humid, especially Texas, points east. 28th-31st. Heavy thunderstorms Texas, all points east. Possible tornado coast of Texas, Louisiana.
Northwestern States
April 2003 1st-3rd. Showers. 4th-7th. Clouds break. 8th-11th. Chilly, with low clouds along Pacific Coast, milder inland. 12th-15th. Cool, showery. 16th-19th. Unsettled conditions. 20th-23rd. Clouds/showers persist. 24th-27th. Chillier, with showers, then clearing. 28th-30th. Quite chilly, but some sunny intervals.
May 2003 1st-3rd. Clear skies, with near-normal temperatures. 4th-7th. Cool, wet. 8th-11th. Changeable skies: clouds/sun/few showers. 12th-15th. Unsettled. 16th-19th. Cool, showery. 20th-23rd. Chilly, with low clouds along Pacific Coast, milder inland. 24th-27th. Clouds, mixed with some sun. 28th-31st. Showery.
Southwestern States
April 2003 1st-3rd. Changeable: sun/clouds/a few scattered showers. 4th-7th. Skies clear. 8th-11th. Fair, quite mild, except along the immediate Pacific Coast. 12th-15th. Clouding up, passing showers. 16th-19th. A few showers shift to the east. Cooler temperatures follow. 20th-23rd. Very warm, dry. 24th-27th. Scattered showers, Utah, northern portions Arizona. 28th-30th. Fair skies return, cooler.
May 2003 1st-3rd. Fair, dry, seasonable. 4th-7th. Unsettled, scattered showers. 8th-11th. Hot, dry. 12th-15th. Showers shift to east, cooler temperatures, clearing skies. 16th-19th. Cloudy, showers. 20th-23rd. Fair, quite mild, except immediate Pacific Coast, where low clouds, cooler temperatures persist. 24th-27th. Scattered showers, thunderstorms, mountains. 28th-31st. Clear and cooler.
Newfoundland, Labrador
April 2003 1st-3rd. Dry and clear. 4th-7th. Unsettled conditions move in. 8th-11th. Lots of sun with seasonable temperatures, and clear, frosty nights. 12th-15th. Rain and showers. 16th-19th. Rain and/or wet snow. 20th-23rd. Rain and/or wet snow showers persist. 24th-27th. Showers, perhaps a little thunder. 28th-30th. Rain, occasionally mixed with flakes of wet snow.
May 2003 1st-3rd. Showery and thundery weather. 4th-7th. Fair and seasonable. 8th-11th. A return to showery rains and thunderstorms. 12th-15th. Changeable skies, with an ongoing shower risk. 16th-19th. Generally fair skies for Victoria Day weekend. 20th-23rd. A mix of clouds and sun. Temperatures warming up. 24th-27th. Warm and rather humid. 28th-31st. Showers, then gradually clearing.
Nova Scotia, Prince Edward Island, New Brunswick, Quebec
April 2003 1st-3rd. Unsettled conditions spread in from the west. 4th-7th. Sunny days, with seasonable temperatures, and clear, frosty conditions at night. 8th-11th. Wet weather. 12th-15th. Rain and/or snow slowly diminish. 16th-19th. More rain or, over Quebec, wet snow showers. 20th-23rd. Showers and thunderstorms. 24th-27th. Dull, dank, and dreary with rain, occasionally mixed with flakes of wet snow, especially over Quebec and higher elevations. 28th-30th. Scattered showers and thunderstorms.
May 2003 1st-3rd. Fair skies and seasonable. 4th-7th. Rain showers and thunderstorms. 8th-11th. In-and-out sun and clouds, with showers highly probable. 12th-15th. Generally fair skies. 16th-19th. Warmer days, with mixed clouds and sun for Victoria Day festivities. 20th-23rd. Warm and humid. 24th-27th. Showers give way to clearing. 28th-31st. Sunshine giving way to increasingly cloudy skies.
Ontario
April 2003 1st-3rd. Showers develop. 4th-7th. Warmer temperatures spread into western Ontario. Clear skies, frosty night Great Lakes. 8th-11th. Cold air, frost, and clearing skies over the Great Lakes. 12th-15th. Mixed clouds and sun. 16th-19th. Rain or wet snow showers. 20th-23rd. Cloudy, cool and rainy for Great Lakes; perhaps even some thunder. 24th-27th. Wet and cold, with showers, some flakes of wet snow across Great Lakes. 28th-30th. Showers with thunder move in from the west.
May 2003 1st-3rd. Showers and thunderstorms eastern Great Lakes. Temperatures
