Washington: Today - Cloudy with showers and scattered thunder showers, high in the 70s, low near 60. The chance of rain is 80 percent through tonight. Winds will be southerly at 10 to 20 mph. Sunday - Occasional rain, high in the 60s.

Maryland and Virginia: Today - Cloudy with showers and occasional thundershowers with some locally heavy downpours, highs from the upper 60s to low 80s, lows in the 50s to near 60. Sunday - Occasional rain, highs from the 50s to near 70.

Lower Potomac and Chesapeake Bay - Showers and thundershowers. Visibility will be less than 1 mile in rain. Waves will average 2 to 3 feet. Winds will be southerly a 15 to 22 knots with guts.

Extended Area Forecast for Monday through Wednesday - Partly cloudy through the period. Highs will be in the upper 60s and 70s, lows in the 50s. Normal Washington temperatures for the period are a high of 77 and a low of 56.

West Virginia: Today - Showers and thundershowers with rain at times, highs will range from the mid 60s to mid 70s, lows in the 50s to near 60. Sunday - Occasional light rain, high in the 60s.

The Council of Governments' Air Quality Index for yesterday showed the high reading in the Washington area during the 3 p.m. period was 48 for the pollutant, photochemical oxidants. Index values between 25 and 49 indicate fair 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 forecast for today indicates that the air quality will improve.

The National Weather Service forecasts the Potomac River stage at Little Falls should fall to near 4.3 feet today.

The National Weather Forecast for today - Showers and thunderstorms are likely from the eastern portion of the mississippi Valley to the East Coast. Showers will also occur in the Northwest from northern California to northwestern Montana. Skies will be mostly sunny from the Rockies to the Mississippi River and over the Southwest. Temperatures will be mild ver most of the southern half of the nation and the East Coast. The rest of the country will have seasonally cool temperatures.

Washington data for yesterday: Highest temperature since midnight yesterday, 81 degrees at 3:45 p.m. Lowest temperature since midnight, 57 degrees at 5:40 a.m. Deficiency high temperature for today, 95 degrees in 1881. Record low temperature for today, 39 degrees in degrees. Deficiency of temperature since Jan. 1, 257 degrees. Record of temperature since May 1, 43

Almanac Data for today: The sun rises 4:58 a.m., sets 8:12 p.m.; moon rises 11:16 a.m.; sets - Tides: high 1:01 p.m. and - low 7:41 a.m. and 8:15 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), 1878. Relative humidity: maximum, 80 percent at 6 a.m.; minimum, 41 percent at 4 p.m. 24 hour precipitation, none. Excess of precipitation since May 1, 82 inches. Excess of precipitation since Jan. 1, 2.95 inches. Highest observed wind since 8 a.m. 21 miles per hour from the south at 3:53 p.m. Peak gust since 8 a.m., 32 miles per hour from the south at 3:50 p.m.

Bloody Point Lighthouse (4 1/2), Dtale, 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: 76 for three & grass (a reading of more than 7 is considered to be undesirable). Local Temps., Humidity(TABLE) Time(COLUMN)T.(COLUMN) . 12 mid.(COLUMN)62(COLUMN)62 1 a.m.(COLUMN)61(COLUMN)65 2 a.m.(COLUMN)60(COLUMN)69 3 a.m.(COLUMN)58(COLUMN)75 4 a.m.(COLUMN)58(COLUMN)75 5 a.m.(COLUMN)58(COLUMN)78 6 a.m.(COLUMN)57(COLUMN)80 7 a.m.(COLUMN)58(COLUMN)78 8 a.m.(COLUMN)59(COLUMN)78 9 a.m.(COLUMN)62(COLUMN)70 10 a.m.(COLUMN)66(COLUMN)63 11 a.m.(COLUMN)70(COLUMN)57 12 noon(COLUMN)72(COLUMN)55 1 p.m.(COLUMN)74(COLUMN)54 2 p.m.(COLUMN)76(COLUMN)52 3 p.m.(COLUMN)80(COLUMN)44 4 p.m.(COLUMN)80(COLUMN)41 5 p.m.(COLUMN)76(COLUMN)48 6 p.m.(COLUMN)75(COLUMN)52 7 p.m.(COLUMN)73(COLUMN)55(END TABLE) Temperatures ending 8 a.m. (EDT) yesterday:(TABLE) City(COLUMN)H.(COLUMN)L. Albany(COLUMN)72(COLUMN)44 Albuquerque(COLUMN)31(COLUMN)48 Amarillo(COLUMN)85(COLUMN)48 Anchorage(COLUMN)61(COLUMN)44 Ashville(COLUMN)74(COLUMN)49 Atlanta(COLUMN)73(COLUMN)55 Atlantic City(COLUMN)62(COLUMN)50 Austin(COLUMN)88(COLUMN)74 Baltimore(COLUMN)74(COLUMN)50 Bilings(COLUMN)54(COLUMN)43 Birmingham(COLUMN)79(COLUMN)62 Bismarck(COLUMN)63(COLUMN)45 Boise(COLUMN)57(COLUMN)37 Boston(COLUMN)65(COLUMN)49 Brownsville(COLUMN)90(COLUMN)78 Bufaffalo(COLUMN)73(COLUMN)57 Burlington Vt.(COLUMN)68(COLUMN)41 Casper(COLUMN)64(COLUMN)37 Charleston, S.C.(COLUMN)76(COLUMN)68 Ch'ston, W.Va.(COLUMN)82(COLUMN)61 Charlotte(COLUMN)79(COLUMN)54 Cheyenne(COLUMN)61(COLUMN)37 Chicago(COLUMN)65(COLUMN)61 Cincinnati(COLUMN)77(COLUMN)58 Cleveland(COLUMN)77(COLUMN)61 Columbia, S.C.(COLUMN)90(COLUMN)52 Columbus, O.(COLUMN)77(COLUMN)63 Dal. Ft. Worth(COLUMN)82(COLUMN)65 Dayton(COLUMN)78(COLUMN)60 Denver(COLUMN)73(COLUMN)44 Des Moines(COLUMN)79(COLUMN)53 Detroit(COLUMN)73(COLUMN)57 Duluth(COLUMN)70(COLUMN)43 El Paso(COLUMN)88(COLUMN)70 Fairbanks(COLUMN)67(COLUMN)40 Fargo(COLUMN)65(COLUMN)48 Flagstaff(COLUMN)68(COLUMN)33 Great Falls(COLUMN)59(COLUMN)38 Hartford(COLUMN)74(COLUMN)43 Helena(COLUMN)60(COLUMN)44 Honolulu(COLUMN)87(COLUMN)73 Houston(COLUMN)83(COLUMN)75 Indianapolis(COLUMN)75(COLUMN)63 Jackson(COLUMN)85(COLUMN)66 Jacksonville(COLUMN)82(COLUMN)60 Juneau(COLUMN)62(COLUMN)48 Kansas City(COLUMN)76(COLUMN)55 Las Vegas(COLUMN)91(COLUMN)62 Little Rock(COLUMN)85(COLUMN)62 Los Angeles(COLUMN)75(COLUMN)59 Louisville(COLUMN)79(COLUMN)60 Memphis(COLUMN)83(COLUMN)66 Miami Beach(COLUMN)80(COLUMN)76 Midland(COLUMN)91(COLUMN)59 Milwaukee(COLUMN)68(COLUMN)53 Mpls.-St. Paul(COLUMN)77(COLUMN)50 Nashville(COLUMN)80(COLUMN)62 New Orleans(COLUMN)83(COLUMN)70 New York(COLUMN)74(COLUMN)53 Norfolk(COLUMN)73(COLUMN)59 North Platte(COLUMN)77(COLUMN)53 Oklahoma City(COLUMN)89(COLUMN)65 Omaha(COLUMN)75(COLUMN)55 Orlando(COLUMN)88(COLUMN)62 Philadelphia(COLUMN)73(COLUMN)48 Phoenix(COLUMN)92(COLUMN)64 Pittsburg(COLUMN)75(COLUMN)62 Portland, Me.(COLUMN)67(COLUMN)37 Portland, Or.(COLUMN)60(COLUMN)43 Providence(COLUMN)69(COLUMN)45 Raleigh(COLUMN)79(COLUMN)54 Rapid City(COLUMN)73(COLUMN)46 Reno(COLUMN)70(COLUMN)33 Richmond(COLUMN)77(COLUMN)55 St. Louis(COLUMN)69(COLUMN)55 St. Phg.-Tampa(COLUMN)88(COLUMN)66 Salt Lake City(COLUMN)73(COLUMN)38 San Antonio(COLUMN)88(COLUMN)73 San Diego(COLUMN)72(COLUMN)62 San Francisco(COLUMN)61(COLUMN)54 San Juan(COLUMN)80(COLUMN)75 St. Ste. Marie(COLUMN)70(COLUMN)53 Seattle(COLUMN)59(COLUMN)45 Shreveport(COLUMN)82(COLUMN)63 Sioux Falls(COLUMN)75(COLUMN)52 Spokane(COLUMN)60(COLUMN)37 Syracuse(COLUMN)72(COLUMN)52 Topeka(COLUMN)78(COLUMN)55 Tucson(COLUMN)86(COLUMN)56 Tulsa(COLUMN)87(COLUMN)66 Washington(COLUMN)74(COLUMN)57 Wichita(COLUMN)86(COLUMN)61(END TABLE) Temperatures Abroad Yesterday(TABLE) City(COLUMN)Weather(COLUMN)Time(COLUMN)Temp. Aberdeen(COLUMN)rain(COLUMN)1 p.m.(COLUMN)50 Amsterdam(COLUMN)pt. cldy.(COLUMN)1 p.m.(COLUMN)50 Ankara(COLUMN)pt. cldy.(COLUMN)3 p.m.(COLUMN)72 Athens(COLUMN)rain(COLUMN)2 p.m.(COLUMN)64 Auckland(COLUMN)cloudy(COLUMN)midnight(COLUMN) 64 Berlin(COLUMN)pt. cldy(COLUMN)1 p.m.(COLUMN)46 Birmingham(COLUMN)pt. cldy(COLUMN)1 p.m.(COLUMN)52 Brussels(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)50 Cairo(COLUMN)clear(COLUMN)2 p.m.(COLUMN)104 Casablanca(COLUMN)clear(COLUMN)noon(COLUMN)72 Copenhagen(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)45 Dublin(COLUMN)rain(COLUMN)1 p.m.(COLUMN)52 Geneva(COLUMN)rain(COLUMN)1 p.m.(COLUMN)48 Hong Kong(COLUMN)cloudy(COLUMN)8 p.m.(COLUMN)75 Jerusalem(COLUMN)pt. cldy.(COLUMN)2 p.m.(COLUMN)86 Lisbon(COLUMN)clear(COLUMN)noon(COLUMN)75 London(COLUMN)clear(COLUMN)1 p.m.(COLUMN)52 Madrid(COLUMN)clear(COLUMN)1 p.m.(COLUMN)70 Malta(COLUMN)pt. cldy.(COLUMN)1 p.m.(COLUMN)66 Manila(COLUMN)clear(COLUMN)8 p.m.(COLUMN)86 Moscow(COLUMN)cloudy(COLUMN)3 p.m.(COLUMN)41 New Delhi(COLUMN)clear(COLUMN)5 p.m.(COLUMN)108 Nice(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)59 Oslo(COLUMN)pt. cldy.(COLUMN)1 p.m.(COLUMN)50 Paris(COLUMN)pt cldy.(COLUMN)1 p.m.(COLUMN)57 Peking(COLUMN)clear(COLUMN)8 p.m.(COLUMN)73 Rome(COLUMN)pt. cldy.(COLUMN)1 p.m.(COLUMN)63 Saigon(COLUMN)Cloudy(COLUMN)8 p.m.(COLUMN)86 Sofia(COLUMN)cloudy(COLUMN)2 p.m.(COLUMN)43 Stockholm(COLUMN)rain(COLUMN)1 p.m.(COLUMN)37 Sydney(COLUMN)clear(COLUMN)10 p.m.(COLUMN)52 Tokyo(COLUMN)clear(COLUMN)9 p.m.(COLUMN)64 Vienna(COLUMN)pt. cldy.(COLUMN)1 p.m.(COLUMN)48 Warsaw cloudy(COLUMN)1 p.m.(COLUMN)41(END TABLE) Temperatures (Western Hemisphere)(TABLE) City(COLUMN)Weather(COLUMN)H.(COLUMN)L. Acapulco(COLUMN)fair(COLUMN)90(COLUMN)77 Barbados(COLUMN)pt. cldy.(COLUMN)84(COLUMN)79 Bermuda(COLUMN)fair(COLUMN)73(COLUMN)65 Culiacan(COLUMN)clear(COLUMN)95(COLUMN)66 Edmonton(COLUMN)cloudy(COLUMN)48(COLUMN)34 Havana(COLUMN)fair(COLUMN)88(COLUMN)75 Kingston(COLUMN)pt. cldy.(COLUMN)91(COLUMN)75 Montego Bay(COLUMN)fair(COLUMN)88(COLUMN)77 Mexico City(COLUMN)clear(COLUMN)86(COLUMN)55 Monterrey(COLUMN)clear(COLUMN)91(COLUMN)72 Montreal(COLUMN)cloudy(COLUMN)64(COLUMN)48 Nassau(COLUMN)cloudy(COLUMN)84(COLUMN)70 Ottawa(COLUMN)cloudy(COLUMN)64(COLUMN)48 Regina(COLUMN)rain(COLUMN)52(COLUMN)41 St. Kitts(COLUMN)pt. cldy.(COLUMN)87(COLUMN)77 St. Thomas(COLUMN)pt. cldy(COLUMN)88(COLUMN)77 Toronto(COLUMN)rain(COLUMN)64(COLUMN)50 Vancouver(COLUMN)cloudy(COLUMN)59(COLUMN)46 Verruz(COLUMN)haze(COLUMN)91(COLUMN)75 Winnipeg(COLUMN)cloudy(COLUMN)61(COLUMN)32(END TABLE)