Forecast for Portland, Maine
| Rest Of Tonight |
Sunday | Sunday Night |
Monday | Monday Night |
Tuesday | Tuesday Night |
Wednesday | Wednesday Night |
Thursday |
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| Clear | Partly Sunny |
Clearing | Sunny | Clear | Mostly Clear |
Mostly Clear |
Sunny | Partly Cloudy |
Snow Showers |
| Lo: 11°F | Hi: 29°F |
Lo: 19°F | Hi: 41°F |
Lo: 29°F | Hi: 39°F Lo: 10°F |
Hi: 39°F Lo: 10°F |
Hi: 31°F |
Lo: 18°F | Hi: 39°F |
Expires: 115 PM EDT SUN FEB 05 2012
- Includes the Cities:
- Portland
- South Portland
- Westbrook
- KPWM is at: Portland, Portland International Jetport
- In the state of: (ME)
- In the country of United States (US)
- Station Latitude = 43.64N (decimal)
- Station Longitude = 70.3W (decimal)
- Station Elevation = 22 (meters)
- Time Zone = Eastern Daylight Time (EDT)
- Time Zone Offset from GMT = -4* (hours)
The International Civil Aviation Organization (ICAO), an agency of the United Nations, codifies the principles and techniques of international air navigation. The ICAO Code is a 4-letter airport code used to determin current conditions at that location at the time of request.
Wind Speed: N 8 MPH
Barometer: 30.14 in.
Dewpoint: 7°F
Heat Index: 18°F
Wind Chill: 8°F
Clear. Lows around 11. North winds around 10 mph late this evening...Becoming light and variable.
Moon Phase: Waxing Gibbous MoonSunset: 5:54 PM EDT
Dusk: 6:24 PM EDT
Partly sunny. Highs in the upper 20s. Light and variable winds.
Sunrise: 7:54 AM EDT
Mostly cloudy in the evening...Then clearing. Lows around 19. Light and variable winds.
Moon Phase: Waxing Gibbous MoonSunset: 5:55 PM EDT
Dusk: 6:25 PM EDT
Sunny. Highs in the lower 40s. Southwest winds around 10 mph.
Sunrise: 7:53 AM EDT
Clear. Lows in the upper 20s. West winds around 10 mph.
Moon Phase: Full MoonSunset: 5:57 PM EDT
Dusk: 6:27 PM EDT
Mostly clear. Highs in the upper 30s. Lows around 10 above.
Sunrise: 7:52 AM EDT
Mostly clear. Highs in the upper 30s. Lows around 10 above.
Moon Phase: Waning Gibbous MoonSunset: 5:58 PM EDT
Dusk: 6:28 PM EDT
Sunny. Highs in the lower 30s.
Sunrise: 7:50 AM EDT
Partly cloudy in the evening...Then becoming mostly cloudy. Lows 15 to 20.
Moon Phase: Waning Gibbous MoonSunset: 5:59 PM EDT
Dusk: 6:29 PM EDT
Mostly cloudy with scattered snow showers. Highs in the upper 30s. Chance of snow 30 percent.
Sunrise: 7:49 AM EDT
Cloudy with scattered rain or snow showers. Lows in the lower 20s. Chance of precipitation 30 percent.
Moon Phase: Waning Gibbous MoonSunset: 6:01 PM EDT
Dusk: 6:31 PM EDT
Mostly cloudy in the morning...Then becoming partly sunny. Scattered rain showers. Highs in the mid 30s. Chance of rain 30 percent.
Sunrise: 7:48 AM EDT
Partly cloudy in the evening...Then becoming mostly clear. Lows 10 to 15.
Moon Phase: Waning Gibbous MoonSunset: 6:02 PM EDT
Dusk: 6:32 PM EDT
Mostly sunny with scattered snow showers. Highs in the mid 20s. Chance of snow 30 percent.
Sunrise: 7:46 AM EDT
Moon Phase: The phases of the Moon are related to (actually, caused by) the relative positions of the Moon and Sun in the sky. For example, New Moon occurs when the Sun and Moon are quite close together in the sky. Full Moon occurs when the Sun and Moon are at nearly opposite positions in the sky - which is why a Full Moon rises about the time of sunset, and sets about the time of sunrise, for most places on Earth.
Waxing Gibbous Moon: The Moon appears to be more than one-half but not fully illuminated by direct sunlight. The fraction of the Moons disk that is illuminated is increasing.
Twilight: Also known as "Dawn" preceding Sunrise and "Dusk" following Sunset. There are three kinds of twilight defined: civil twilight, nautical twilight, and astronomical twilight. For computational purposes, civil twilight begins before sunrise and ends after sunset when the geometric zenith distance of the center of the Sun is 96 degrees - 6 degrees below a horizontal plane. The corresponding solar zenith distances for nautical and astronomical twilight are 102 and 108 degrees, respectively. That is, at the dark limit of nautical twilight, the center of the Sun is geometrically 12 degrees below a horizontal plane; and at the dark limit of astronomical twilight, the center of the Sun is geometrically 18 degrees below a horizontal plane.
Sunrise and sunset: For computational purposes, sunrise or sunset is defined to occur when the geometric zenith distance of center of the Sun is 90.8333 degrees. That is, the center of the Sun is geometrically 50 arcminutes below a horizontal plane. For an observer at sea level with a level, unobstructed horizon, under average atmospheric conditions, the upper limb of the Sun will then appear to be tangent to the horizon. The 50-arcminute geometric depression of the Sun's center used for the computations is obtained by adding the average apparent radius of the Sun (16 arcminutes) to the average amount of atmospheric refraction at the horizon (34 arcminutes).
Accuracy of rise/set computations: The times of rise and set phenomena cannot be precisely computed, because, in practice, the actual times depend on unpredictable atmospheric conditions that affect the amount of refraction at the horizon. Thus, even under ideal conditions (e.g., a clear sky at sea) the times computed for rise or set may be in error by a minute or more. Local topography (e.g., mountains on the horizon) and the height of the observer can affect the times of rise or set even more. It is not practical to attempt to include such effects in routine rise/set computations.