Washington: Today - Sunny and warm, high in the 80s, low near 60. The chance of rain is near zero today, 10 percent tonight. Winds will be from the southwest at 10 to 15 mph.Sunday - Chance of thundershowers, high in the 80s.

Maryland and Virginia: Today - Sunny and warm, high in the 80s, low in the 50s to near 60. Sunday - A chance of showers or thunderstorms, high in the 70s to near 80.

Lower Potomac and Chesapeake Bay - Fair with visibility greater than 5 miles except in early morning haze. Winds will be from the southwest at 10 to 15 knots. Waves will average 1 to 2 feet.

Extended Area Forecast for Monday through Wednesday - Fair and pleasant through the period. Highs will average from the 70s to low 80s and lows from the 50s to near 60. Normal Washington temperatures for the period are a high of 79 and a low of 58.

West Virginia: Today - Sunny with increasing cloudiness tonight, highs will range from the upper 70s to mid 80s, lows from the mid 50s to mid 60s. Sunday - Chance of showers, high in the 70s.

The National Weather Forecast for today - Showers and occasional thunderstorms will reach from northwest Texas and Oklahoma through the central half of the Mississippi Valley, over the Great Lakes, the Ohio Valley and the northern half of the Appalachians to northern New England. Temperatures will be warm over the Atlantic Coast from southern New England through Florida and across the Southeast and Gulf states across the Texas coast. It will also be warm along the southern California coast. Cool temperatures will extend over the northern half of the Rockies and western portions of the Plains through northern Minnesota. Temperatures elsewhere will generally be mild.

The Council of Government's Air Quality Index for yesterday showed the high reading in the Washington area during the 3 p.m. period was 46 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 6.0 feet by Sunday. Stages above 5 feet are considered hazardous for recreational activities.

Almanac Data for today: The sun rises 5:52 a.m., sets 8:18 p.m.; moon rises 6:17 p.m., sets 4:40 a.m. Tides: high 6:52 a.m. and 7:21 p.m., low 1:13 a.m and 1:57 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: 52 grass (a reading of more than 7 is considered to be undesirable).

Washington data for yesterday: Highest temperature since midnight yesterday, 80 degrees at 4:05 p.m. Lowest temperature since midnight, 60 degrees at 5:46 a.m. Deficiency of temperature since May 1, 56 degrees. Deficiency of temperature since Jan. 1, 270 degrees. Record high temperature for today, 95 degrees in 1911. Record low temperature for today, 43 degrees in 1915. Relative humidity: maximum, 87 percent at 6 a.m.; minimum, 44 percent at 4 p.m. 24 hour precipitation, none. Excess of precipitation since May 1, 1.69 inches. Excess of precipitation since Jan. 1, 4.82 inches. Highest observed wind since 8 a.m. 15 miles per hour from the northwest at 3:53 p.m. Peak gust since 8 a.m., 23 miles per hour from the north at 12:55 p.m. Local Temp., Humidity(TABLE) Time(COLUMN)T.(COLUMN)H. 12 midnight(COLUMN)62(COLUMN)87 1 a.m.(COLUMN)63(COLUMN)84 2 a.m.(COLUMN)66(COLUMN)70 3 a.m.(COLUMN)66(COLUMN)68 4 a.m.(COLUMN)65(COLUMN)70 5 a.m.(COLUMN)63(COLUMN)78 6 a.m.(COLUMN)60(COLUMN)87 7 a.m.(COLUMN)61(COLUMN)84 8 a.m.(COLUMN)65(COLUMN)73 9 a.m.(COLUMN)68(COLUMN)66 10 a.m.(COLUMN)71(COLUMN)59 11 a.m.(COLUMN)73(COLUMN)55 12 noon(COLUMN)74(COLUMN)54 1 p.m.(COLUMN)74(COLUMN)52 2 p.m.(COLUMN)77(COLUMN)49 3 p.m.(COLUMN)78(COLUMN)47 4 p.m.(COLUMN)79(COLUMN)44 5 p.m.(COLUMN)79(COLUMN)44 6 p.m.(COLUMN)79(COLUMN)46 7 p.m.(COLUMN)79(COLUMN)46(END TABLE) Temperatures ending 8 a.m. (EDT) yesterday:(TABLE) City(COLUMN)H.(COLUMN)L. Albany(COLUMN)62(COLUMN)43 Albuquerque(COLUMN)77(COLUMN)49 Amarillo(COLUMN)89(COLUMN)61 Anchorage(COLUMN)58(COLUMN)45 Atlanta(COLUMN)80(COLUMN)62 Atlantic City(COLUMN)65(COLUMN)52 Austin(COLUMN)91(COLUMN)74 Baltimore(COLUMN)76(COLUMN)56 Billings(COLUMN)47(COLUMN)44 Birmingham(COLUMN)76(COLUMN)61 Bismarck(COLUMN)69(COLUMN)52 Boise(COLUMN)65(COLUMN)48 Boston(COLUMN)58(COLUMN)52 Brownsville(COLUMN)93(COLUMN)79 Buffalo(COLUMN)61(COLUMN)49 Burlington, Vt.(COLUMN)63(COLUMN)46 Casper(COLUMN)42(COLUMN)38 Charleston, S.C.(COLUMN)75(COLUMN)64 Charleston, W.Va.(COLUMN)77(COLUMN)57 Charlotte(COLUMN)78(COLUMN)58 Cheyenne(COLUMN)58(COLUMN)37 Chicago(COLUMN)79(COLUMN)57 Cincinnati(COLUMN)77(COLUMN)51 Cleveland(COLUMN)73(COLUMN)53 Columbia, S.C(COLUMN)77(COLUMN)59 Columbus(COLUMN)77(COLUMN)52 Dal.-Ft. Worth(COLUMN)92(COLUMN)70 Dayton(COLUMN)79(COLUMN)53 Denver(COLUMN)68(COLUMN)43 Des Moines(COLUMN)78(COLUMN)61 Detroit(COLUMN)81(COLUMN)59 Duluth(COLUMN)85(COLUMN)59 El Paso(COLUMN)87(COLUMN)58 Fairbanks(COLUMN)63(COLUMN)37 Fargo(COLUMN)80(COLUMN)60 Flagstaff(COLUMN)67(COLUMN)29 Great Falls(COLUMN)50(COLUMN)44 Hartford(COLUMN)60(COLUMN)50 Helena(COLUMN)52(COLUMN)47 Houston(COLUMN)86(COLUMN)76 Indianapolis(COLUMN)82(COLUMN)56 Jackson(COLUMN)86(COLUMN)64 Jacksonville(COLUMN)90(COLUMN)70 Juneau(COLUMN)47(COLUMN)44 Kansas City(COLUMN)76(COLUMN)64 Las Vegas(COLUMN)86(COLUMN)56 Little Rocks(COLUMN)72(COLUMN)63 Los Angeles(COLUMN)91(COLUMN)64 LOuisville(COLUMN)79(COLUMN)54 Memphis(COLUMN)78(COLUMN)65 Miami Beach(COLUMN)80(COLUMN)72 Midland(COLUMN)92(COLUMN)73 Milwaukee(COLUMN)78(COLUMN)53 Mpis.-St. Paul(COLUMN)80(COLUMN)62 Nashville(COLUMN)79(COLUMN)52 New Orleans(COLUMN)86(COLUMN)67 New York(COLUMN)62(COLUMN)53 Norfolk(COLUMN)82(COLUMN)65 North Platte(COLUMN)74(COLUMN)41 Oklahoma City(COLUMN)86(COLUMN)67 Omaha(COLUMN)75(COLUMN)65 Orlando(COLUMN)93(COLUMN)68 Philadelphia(COLUMN)72(COLUMN)56 Phoenix(COLUMN)94(COLUMN)66 Pittsburgh(COLUMN)72(COLUMN)52 Portland. Me.(COLUMN)53(COLUMN)44 Portland, Or.(COLUMN)77(COLUMN)51 Providence(COLUMN)63(COLUMN)50 Raleigh(COLUMN)81(COLUMN)56 Rapid City(COLUMN)62(COLUMN)45 Reno(COLUMN)73(COLUMN)36 Richmond(COLUMN)84(COLUMN)58 St. Louis(COLUMN)77(COLUMN)55 St. Prbg.-Tampa(COLUMN)90(COLUMN)67 Salt Lake City(COLUMN)63(COLUMN)40 San Antonio(COLUMN)89(COLUMN)75 San Diego(COLUMN)85(COLUMN)66 San Francisco(COLUMN)86(COLUMN)64 San Juan(COLUMN)87(COLUMN)73 St. Ste. Marie(COLUMN)74(COLUMN)49 Seattle(COLUMN)68(COLUMN)52 Shreveport(COLUMN)90(COLUMN)68 Sioux Falls(COLUMN)77(COLUMN)56 Spokane(COLUMN)70(COLUMN)44 Syracuse(COLUMN)65(COLUMN)43 Topeka(COLUMN)82(COLUMN)65 Tucson(COLUMN)89(COLUMN)65 Tulsa(COLUMN)78(COLUMN)70 Washington(COLUMN)79(COLUMN)60 Wichita(COLUMN)73(COLUMN)65(END TABLE) Temperatures Abroad Yesterday(TABLE) City(COLUMN)Weather(COLUMN)Time(COLUMN)Temp. Aberdeen(COLUMN)clear(COLUMN)1 p.m.(COLUMN)57 Amsterdam(COLUMN)clear(COLUMN)1 p.m.(COLUMN)66 Ankara(COLUMN)clear(COLUMN)3 p.m.(COLUMN)70 Athens(COLUMN)clear(COLUMN)2 p.m.(COLUMN)75 Auckland(COLUMN)clear(COLUMN)midnight(COLUMN)55 Berlin(COLUMN)clear(COLUMN)1 p.m.(COLUMN)70 Birmingham(COLUMN)clear(COLUMN)1 p.m.(COLUMN)55 Brussels(COLUMN)pt. cldy.(COLUMN)1 p.m.(COLUMN)66 Cairo(COLUMN)clean(COLUMN)2 p.m.(COLUMN)93 Casablanca(COLUMN)pt. cldy.(COLUMN)noon(COLUMN)68 Copenhagen(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)59 Dublin(COLUMN)pt. cldy.(COLUMN)1 p.m.(COLUMN)55 Geneva(COLUMN)pt. cldy.(COLUMN)1 p.m.(COLUMN)57 Hong Kong(COLUMN)cloudy(COLUMN)8 p.m.(COLUMN)81 Jerusalem(COLUMN)clear(COLUMN)2 p.m.(COLUMN)81 Lisbon(COLUMN)pt. cldy.(COLUMN)noon(COLUMN)64 London(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)55 Madrid(COLUMN)clear(COLUMN)1 p.m.(COLUMN)70 Malta(COLUMN)clear(COLUMN)1 p.m.(COLUMN)77 Manila(COLUMN)cloudy(COLUMN)8 p.m.(COLUMN)84 Moscow(COLUMN)pt. cldy.(COLUMN)3 p.m.(COLUMN)72 New Delhi(COLUMN)clear(COLUMN)5 p.m.(COLUMN)109 Nice(COLUMN)pt. cldy.(COLUMN)1 p.m.(COLUMN)66 Oslo(COLUMN)pt. cldy.(COLUMN)1 p.m.(COLUMN)61 Paris(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)55 Peking(COLUMN)cloudy(COLUMN)8 p.m.(COLUMN)68 Rome(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)68 Saigon(COLUMN)cloudy(COLUMN)8 p.m.(COLUMN)86 Sofia(COLUMN)rain(COLUMN)2 p.m.(COLUMN)57 Stockholm(COLUMN)pt. cldy.(COLUMN)1 p.m.(COLUMN)57 Sydney(COLUMN)clear(COLUMN)10 p.m.(COLUMN)59 Tokyo(COLUMN)clear(COLUMN)9 p.m.(COLUMN)70 Tunis(COLUMN)clear(COLUMN)1 p.m.(COLUMN)75 Vienna(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)59 Warsaw(COLUMN)pt. cldy.(COLUMN)1 p.m.(COLUMN)61(END TABLE) Temperatures (Western Hemisphere)(TABLE) City(COLUMN)Weather(COLUMN)H.(COLUMN)L. Acapulco(COLUMN)sunny(COLUMN)86(COLUMN)70 Barbados(COLUMN)cloudy(COLUMN)86(COLUMN)80 Bogota(COLUMN)cloudy(COLUMN)66(COLUMN)47 Calgary(COLUMN)clear(COLUMN)63(COLUMN)36 Culiacan(COLUMN)haze(COLUMN)86(COLUMN)70 Edmonton(COLUMN)clear(COLUMN)66(COLUMN)37 Havana(COLUMN)pt. cldy.(COLUMN)86(COLUMN)72 Kingston(COLUMN)sunny(COLUMN)90(COLUMN)82 Montego Bay(COLUMN)cloudy(COLUMN)90(COLUMN)75 Mexico City(COLUMN)haze(COLUMN)81(COLUMN)59 Monterrey(COLUMN)cloudy(COLUMN)91(COLUMN)72 Montreal(COLUMN)clear(COLUMN)66(COLUMN)50 Ottawa(COLUMN)clear(COLUMN)68(COLUMN)50 Regina(COLUMN)pt. cldy.(COLUMN)63(COLUMN)36 St. Kitts(COLUMN)pt. cldy.(COLUMN)86(COLUMN)72 St. Thomas(COLUMN)pt. cldy(COLUMN)90(COLUMN)76 Toronto(COLUMN)clear(COLUMN)68(COLUMN)48 Vancouver(COLUMN)clear(COLUMN)64(COLUMN)50 Veracruz(COLUMN)haza(COLUMN)90(COLUMN)76 Winnipeg(COLUMN)rain(COLUMN)77(COLUMN)43(END TABLE)