Washington: Today - Variable cloudiness with a chance of showers or thunderstorms high in the 90s, low 65 to 70. The chance of rain is 30 percent through tonight. Winds will be northwesterly at 10 mph. Saturday - Partial clearing and cooler, high in the 80s.

Maryland and Virginia: Today - Variable cloudiness with a chance of showers or thunderstorms, high near 90, low in the 60s. Saturday - Partial clearing and cooler, high in the 80s.

Extended Area Forecast for Sunday through Tuesday - Cooler through the period. Fair Sunday, chance of shower's Monday and Tuesday. Highs will average in the 80s, lows in the 50s in the mountains. Normal Washington temperatures are a high of 85 and a low of 66.

Lower Potomac and Chesapeake Bay - Partly cloudy with a chance of thunderstorms. Visibility will be 5 miles or more diminishing to less than 1 mile in haze and thunderstorms. Winds will be from the northeast at 10 to 15 knots. Waves will average 1 to 2 feet.

Atlantic Ocean Beaches from New Jersey to Virginia Today - Partly cloudy with a chance of thunderstorms, high in the low to mid 80s. Saturday - clearing and cooler, high in the upper 70s to low 80s. Water temperatures will be in the mid 71s.

Atlantic Ocean Beaches of North Carolina: Today - Sunny and warm, high in the mid 80s. Saturday - Partly cloudy with a chance of afternoon or evening thundershowers high in the mid 80s. Water temperatures will be near 80.

West Virginia: Today - Partly cloudy, warm and humid with a chance of showers or thundershowers, highs will range from the mid 70s to mid 80s, lows from the mid 58s to mid 60s. Saturday - Partly cloudy with a chance of showers high near 80.

The National Weather Forecast for Today - Scattered thundershowers will be spread from the upper Ohio Valley and the lower Great Lakes region across the north and central Appalachians to the Atlantic Coast. They will also be found over the Gulf Coast region. Florida, the western portions of the mid Mississippi Valley and the southern Rockies Rain showers will reach from the Pacific Northwest across Idaho and western Montana. It will be another hot day from Oklahoma and Arkansas through the eastern sectors of the central Plains, Missouri and Iowa. Mild or cool temperatures will stretch from most of California and the Pacific Northwest across the Intermountain Region and western Montana. It will also be mild in New England and northeastern New York. The rest of the nation will have seasonably warm weather.

Almanac Data for today: The sun rises 6:30 a.m., sets 7:00 p.m.; moon rises 12:30 a.m. sets 2:00 a.m. Tides: high 2:05 a.m. and 2:24 p.M. low 9:01 a.m. and 9:14 p.m. High and low tides at the following locations may be obtained by subtracting the hours indicated from the hours above: Annapolis (3 1/4), Bloody Point Lighthouse (4 1/2), Deale, Md. (4 1/2), Colonial Beach (5 1/4), Norfolk (1), Virginia Beach (3/4), Solomons Island (6 1/4), Point Lookout (7).

Pollen Count 16-Ragweed (a reading of more than 7 is considered to be undesirable).

The Council of Governments' Air Quality Index for yesterday showed the high reading in the Washington area during the 3 p.m., period was 101 for the pollutant, photochemical oxidants. Index values between 100 and 200 indicate very unhealthy air quality. When the index exceeds 100 the air is considered very unhealthy and individuals with lung, heart and eye ailments are urged to restrict their activity. The air pollution alert will remain in effect through this afternoon.

The National Weather Service forecasts the Potomac River Stage at Little Falls should remain near 3.2 feet today.

Washington data for yesterday: Highest temperature since midnight yesterday, 93 degrees at 1:35 p.m. Lowest temperatures since midnight, 70 degrees at 4:10 a.m. Excess of temperature since Aug. 1, 87 degrees. Deficiency of temperature since Jan. 1, 54 degrees. Record high temperature for today, 9 1/2 degrees in 1936. Record low temperature for today, 54 degrees in 1935. Relative humidity: maximum, 54 percent at 6 a.m.; minimum, 44 percent at 2 p.m., 24-hour precipitation, some. Deficiency of precipitation since Jan. 1, 2.43 inches. Highest observed wind since 8 a.m., 14 miles per hour from the northwest at 11:53 a.m. Peak gust since 8 a.m., 21 miles per hour from the northwest at 12:20 p.m.

Local Temps. Humidity(TABLE) Time(COLUMN)T.(COLUMN)H. 12 mid.(COLUMN)77(COLUMN)65 1 a.m.(COLUMN)75(COLUMN)71 2 a.m.(COLUMN)74(COLUMN)74 3 a.m.(COLUMN)74(COLUMN)74 4 a.m.(COLUMN)74(COLUMN)74 5 a.m.(COLUMN)72(COLUMN)82 6 a.m.(COLUMN)71(COLUMN)84 7 a.m.(COLUMN)71(COLUMN)84 8 a.m.(COLUMN)73(COLUMN)82 9 a.m.(COLUMN)76(COLUMN)74 10 a.m.(COLUMN)79(COLUMN)67 11 a.m.(COLUMN)83(COLUMN)50 12 noon(COLUMN)88(COLUMN)50 1 p.m.(COLUMN)90(COLUMN)47 2 p.m.(COLUMN)92(COLUMN)46 3 p.m.(COLUMN)92(COLUMN)46 4 p.m.(COLUMN)91(COLUMN)46 5 p.m.(COLUMN)91(COLUMN)46 6 p.m.(COLUMN)90(COLUMN)47 7 p.m.(COLUMN)88(COLUMN)50(END TABLE)

Temperatures ending 8 a.m. (EDT) yesterday:(TABLE) City(COLUMN)H.(COLUMN)L. Albany(COLUMN)84(COLUMN)62 Albuquerque(COLUMN)87(COLUMN)64 Amarillo(COLUMN)92(COLUMN)69 Anchorage(COLUMN)71(COLUMN)45 Asheville(COLUMN)86(COLUMN)61 Atlanta(COLUMN)88(COLUMN)66 Atlantic City(COLUMN)84(COLUMN)70 Austin(COLUMN)97(COLUMN)74 Baltimore(COLUMN)90(COLUMN)64 Billings(COLUMN)79(COLUMN)51 Birmingham(COLUMN)90(COLUMN)70 Bismarck(COLUMN)81(COLUMN)51 Boise(COLUMN)82(COLUMN)54 Boston(COLUMN)88(COLUMN)67 Brownsville(COLUMN)94(COLUMN)76 Buffalo(COLUMN)82(COLUMN)69 Burlington, Vt.(COLUMN)81(COLUMN)55 Casper(COLUMN)87(COLUMN)46 Charleston, S.C.(COLUMN)87(COLUMN)73 Charleston, W.V.(COLUMN)86(COLUMN)62 Charlotte(COLUMN)87(COLUMN)62 Cheyenne(COLUMN)85(COLUMN)53 Chicago(COLUMN)87(COLUMN)72 Cincinnati(COLUMN)87(COLUMN)66 Cleveland(COLUMN)88(COLUMN)66 Columbia, S.C.(COLUMN)87(COLUMN)59 Dal.-Ft. Worth(COLUMN)99(COLUMN)75 Dayton(COLUMN)84(COLUMN)66 Denver(COLUMN)92(COLUMN)58 Des Moines(COLUMN)95(COLUMN)77 Detroit(COLUMN)88(COLUMN)63 Duluth(COLUMN)62(COLUMN)51 El Paso(COLUMN)96(COLUMN)67 Evansville(COLUMN)93(COLUMN)67 Fairbanks(COLUMN)57(COLUMN)42 Fargo(COLUMN)81(COLUMN)59 Flagstaff(COLUMN)78(COLUMN)44 Great Falls(COLUMN)74(COLUMN)46 Hartford(COLUMN)85(COLUMN)62 Helena(COLUMN)77(COLUMN)45 Houston(COLUMN)92(COLUMN)77 Indianapolis(COLUMN)87(COLUMN)68 Jackson(COLUMN)97(COLUMN)75 Jacksonville(COLUMN)88(COLUMN)71 Juneau(COLUMN)73(COLUMN)42 Kansas City(COLUMN)97(COLUMN)76 Las Vegas(COLUMN)98(COLUMN)76 Little Rock(COLUMN)98(COLUMN)76 Los Angeles(COLUMN)80(COLUMN)63 Louisiana(COLUMN)90(COLUMN)74 Memphis(COLUMN)93(COLUMN)70 Miami Beach(COLUMN)77(COLUMN)72 Midland(COLUMN)93(COLUMN)68 Milwaukee(COLUMN)85(COLUMN)49 Mpls.-St. Paul(COLUMN)90(COLUMN)65 Nashville(COLUMN)89(COLUMN)72 New Orleans(COLUMN)91(COLUMN)77 New York(COLUMN)85(COLUMN)64 Norfolk(COLUMN)86(COLUMN)63 North Platte(COLUMN)97(COLUMN)65 Oklahoma City(COLUMN)100(COLUMN)71 Omaha(COLUMN)95(COLUMN)76 Orlando(COLUMN)93(COLUMN)74 Philadelphia(COLUMN)91(COLUMN)70 Phoenix(COLUMN)104(COLUMN)82 Pittsburgh(COLUMN)83(COLUMN)62 Portland, Ma.(COLUMN)86(COLUMN)59 Portland, Ore.(COLUMN)70(COLUMN)68 Providence(COLUMN)82(COLUMN)64 Raleigh(COLUMN)90(COLUMN)61 Rapid City(COLUMN)84(COLUMN)57 Reno(COLUMN)81(COLUMN)40 Richmond(COLUMN)90(COLUMN)64 St. Louis(COLUMN)95(COLUMN)76 St. Prbg.-Tampa(COLUMN)92(COLUMN)75 Salt Lake City(COLUMN)88(COLUMN)61 San Antonio(COLUMN)93(COLUMN)74 San Diego(COLUMN)78(COLUMN)63 San Francisco(COLUMN)65(COLUMN)59 San Juan(COLUMN)90(COLUMN)78 St. Ste. Marie(COLUMN)62(COLUMN)55 Seattle(COLUMN)66(COLUMN)58 Shreveport(COLUMN)99(COLUMN)72 Sioux Falls(COLUMN)88(COLUMN)69 Spokane(COLUMN)70(COLUMN)54 Syracuse(COLUMN)82(COLUMN)68 Topeka(COLUMN)97(COLUMN)70 Tucson(COLUMN)93(COLUMN)75 Tulsa(COLUMN)103(COLUMN)77 Washington(COLUMN)89(COLUMN)70 Wichita(COLUMN)103(COLUMN)75(END TABLE)

Temperatures Abroad Yesterday (TABLE) City(COLUMN)Weather(COLUMN)Time(COLUMN)Temp. Aberdeen(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)63 Armsterdam(COLUMN)cloudy(COLUMN)1 p.m(COLUMN)64 Ankara(COLUMN)pt. cldy.(COLUMN)3 p.m.(COLUMN)77 Athens(COLUMN)clear(COLUMN)2 p.m.(COLUMN)91 Auckland(COLUMN)cloudy(COLUMN)midnight(COLUMN)51 Berlin(COLUMN)pt. cldy(COLUMN)1 p.m.(COLUMN)64 Birmingham(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)67 Bonn(COLUMN)clear(COLUMN)1 p.m.(COLUMN)70 Brussels(COLUMN)pt. cldy.(COLUMN)1 p.m.(COLUMN)68 Casablanca(COLUMN)pt. cldy.(COLUMN)noon(COLUMN)81 Copenhagen(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)64 Dublin(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)61 Geneva(COLUMN)pt. cldy.(COLUMN)1 p.m.(COLUMN)72 Hong Kong(COLUMN)pt. cldy.(COLUMN)8 p.m.(COLUMN)84 Lisbon(COLUMN)clear(COLUMN)noon(COLUMN)90 London(COLUMN)clear(COLUMN)1 p.m.(COLUMN)64 Madrid(COLUMN)clear(COLUMN)1 p.m.(COLUMN)90 Malta(COLUMN)pt. cldy.(COLUMN)1 p.m.(COLUMN)79 Manila(COLUMN)cloudy(COLUMN)8 p.m.(COLUMN)79 Moscow(COLUMN)clear(COLUMN)3 p.m.(COLUMN)75 New Delhi(COLUMN)pt. cldy.(COLUMN)5 p.m.(COLUMN)88 Nice(COLUMN)pt. cldy.(COLUMN)1 p.m.(COLUMN)77 Oslo(COLUMN)pt. cldy.(COLUMN)1 p.m.(COLUMN)66 Paris(COLUMN)clear(COLUMN)1 p.m.(COLUMN)72 Peking(COLUMN)clear(COLUMN)8 p.m.(COLUMN)81 Rome(COLUMN)clear(COLUMN)1 p.m.(COLUMN)82 Saigon(COLUMN)rain(COLUMN)8 p.m.(COLUMN)77 Sofia(COLUMN)clear(COLUMN)2 p.m.(COLUMN)77 Stockholm(COLUMN)pt. cldy.(COLUMN)1 p.m.(COLUMN)66 Sydney(COLUMN)clear(COLUMN)10 p.m.(COLUMN)52 Tokyo(COLUMN)pt. cldy.(COLUMN)9 p.m.(COLUMN)84 Tunis(COLUMN)clear(COLUMN)1 p.m.(COLUMN)84 Vienna(COLUMN)haze(COLUMN)1 p.m.(COLUMN)70 Warsaw (COLUMN)pt. cldy.(COLUMN)1 p.m.(COLUMN)66(END TABLE)

Temperatures (Western Hemisphere)(TABLE) City(COLUMN)Weather(COLUMN)H.(COLUMN)L. Acapulco(COLUMN)pt. cldy.(COLUMN)91(COLUMN)76 Barbados(COLUMN)pt. cldy.(COLUMN)88(COLUMN)77 Bermuda(COLUMN)pt. cldy.(COLUMN)87(COLUMN)76 Bogota(COLUMN)pt. cldy.(COLUMN)63(COLUMN)46 Calgury(COLUMN)pt. cldy.(COLUMN)57(COLUMN)43 Culiacan(COLUMN)pt. cldy.(COLUMN)93(COLUMN)76 Edmonton(COLUMN)clear(COLUMN)57(COLUMN)43 Havana(COLUMN)cloudy(COLUMN)90(COLUMN)74 Kingston(COLUMN)clear(COLUMN)88(COLUMN)79 Montego Bay(COLUMN)90(COLUMN)76 Mexico City(COLUMN)fair(COLUMN)25(COLUMN)57 Monterrey(COLUMN)cloudy(COLUMN)96(COLUMN)77 Montreal(COLUMN)rain(COLUMN)75(COLUMN)54 Nassau(COLUMN)cloudy(COLUMN)90(COLUMN)72 Ottawa(COLUMN)rain(COLUMN)72(COLUMN)50 Regina(COLUMN)clear(COLUMN)73(COLUMN)48 St. Kitts(COLUMN)fair(COLUMN)90(COLUMN)77 Toronto(COLUMN)haze(COLUMN)82(COLUMN)66 Vancouver(COLUMN)rain(COLUMN)68(COLUMN)59 Veracruz(COLUMN)pt. cldy.(COLUMN)88(COLUMN)73 Winnipeg(COLUMN)cloudy(COLUMN)63(COLUMN)59(END TABLE)