Washington: Today - Sunny, high near 70, low near 50. The chance of rain is near zero through tonight. Saturday - Sunny, high in the mid '70s.

Maryland and Virginia: Today - Sunny, high from the mid 60s to the mid 70s, lows from in the 40s. Saturday - Sunny, highs from the upper 60s to the upper 70s.

Lower Potomac and Chesapeake Bay: Today - Fair with visibility of more than 5 miles. Wind will be from the northwest at from 5 to 10 knots. Waves in unprotected waters will be near 2 feet.

Extended Area Forecast for Sunday through Tuesday: Partly cloudy on Sunday, chance of rain on Monday and Tuesday. Highs will be in the 60s, lows in the 70s.Normal Washington temperatures for the period are a high of 67 and a low of 47.

The National Weather Forecast for today - The only chance of precipitation will be over western Washington, where scattered showers may appear. Except for partly cloudy skies over the Pacific northwest, the Rockies and the Gulf Coast, sunny skies will be seen elsewhere. Cool temperatures will remain from New England through the middle Atlantic Coast and the Carollnas. It will also be cool over the northern Great Lakes and turn cooler over the Rockies. Most of the rest of the nation will be seasonably mild.

Almanac Data for - Today. Sun rises 7:23 a.m., sets 6:22 p.m.; Moon rises 3:29 p.m., sets 1:56 a.m. Tides: High 3:54 a.m., and 4:36 p.m., low 10:50 a.m., and 11:18 p.m. High and low tides at the folowing locations can be obtained by subtracting the hours indicated from the tides above. Anapolis (1 1/2); Bloody Point Lighthouse (4 1/2); Deale. Md. (4 1/2); Colonial Beach (6); Norfolk (1 1/2); Virginia Beach (1); So'mons Island (6 1/2); Point Lookout (7).

The Council of Governments' Air Quality Index for yesterday showed the high reading in the Washington area during the 2 p.m. to 3 p.m., period was 28 for the pollutant, photochemical oxdlants. Index values between 25 and 49 indicate fair air quality. When the index exceeds 100 the air is considered very unhealty and individuals with lungs, heart and eveailments are urged to restrict their activity. The forecast for today indicates that the air quality will be fair.

The National Weather Service forecasts the Potomac River stage at Little Falls should be near 3.3 feet today.

Washington data at 8 p.m. (EDT) yesterday: Highest temperature since 8 a.m. yesterday, 66 degrees at 3:35 p.m. Lowest temperature since midnight, 51 degrees at 4:15. Deficiently of temperature since October 1, 67 degrees. excess of temperature since Jan. 1, 374 degrees. Record high temperature for today, 65 degrees in 1947. Record low temperature for today, 30 degrees in 1974. Relative humidity: Maximum, 67 per cent at 2 p.m.; Minimum, 33 per cent at 3 p.m. Excess of precipitation since October 7, 1.17 inches. Deficiency of precipitation since Jan. 1, 7.46 inches. Highest observed wind since 8 a.m. 22 miles per hour from the northwest at 9:53 a.m. Peak gust since 8 a.m., 33 miles per hour from the northwest at 10:57 a.m. Local Temp., Humidty(TABLE) Time(COLUMN)T.(COLUMN)H. 12 mdnt(COLUMN)63(COLUMN)67 1 a.m.(COLUMN)52(COLUMN)66 2 a.m.(COLUMN)52(COLUMN)69 3 a.m.(COLUMN)52(COLUMN)69 4 a.m.(COLUMN)52(COLUMN)69 5 a.m.(COLUMN)56(COLUMN)66 6 a.m.(COLUMN)53(COLUMN)66 7 a.m.(COLUMN)54(COLUMN)66 8 a.m.(COLUMN)53(COLUMN)66 9 a.m.(COLUMN)55(COLUMN)59 10 a.m.(COLUMN)60(COLUMN)50 11 a.m.(COLUMN)62(COLUMN)44 12 noon(COLUMN)63(COLUMN)43 1 p.m.(COLUMN)64(COLUMN)41 2 p.m.(COLUMN)65(COLUMN)33 3 p.m.(COLUMN)64(COLUMN)38 4 p.m.(COLUMN)64(COLUMN)38 5 p.m.(COLUMN)64(COLUMN)38 6 p.m.(COLUMN)62(COLUMN)41 7 p.m.(COLUMN)61(COLUMN)41(END TABLE) Temperatures ending 8 a.m. (EDT) Yesterday(TABLE) City(COLUMN)H.(COLUMN)L. Albany(COLUMN)51(COLUMN)47 Albuquerque(COLUMN)79(COLUMN)48 Amarllio(COLUMN)84(COLUMN)51 Anchorage(COLUMN)29(COLUMN)26 Asheville(COLUMN)61(COLUMN)35 Atlanta(COLUMN)70(COLUMN)42 Atlantic City(COLUMN)65(COLUMN)42 Austin(COLUMN)88(COLUMN)61 Baltimore(COLUMN)62(COLUMN)48 Bitilnos(COLUMN)76(COLUMN)43 Birmingham(COLUMN)70(COLUMN)42 Bismarck(COLUMN)75(COLUMN)34 Boise(COLUMN)71(COLUMN)41 Boston(COLUMN)57(COLUMN)51 Brownsville(COLUMN)85(COLUMN)62 Buffalo(COLUMN)58(COLUMN)44 Burlington(COLUMN)53(COLUMN)45 Casper(COLUMN)75(COLUMN)40 Charleston, S.C.(COLUMN)76(COLUMN)50 Charl't'n, W.Va.(COLUMN)53(COLUMN)38 Charlottle(COLUMN)68(COLUMN)44 Chyenna(COLUMN)43(COLUMN)38 Chicago(COLUMN)59(COLUMN)40 Cincinnatl(COLUMN)56(COLUMN)32 Cleveland(COLUMN)57(COLUMN)41 Columbia, S.C.(COLUMN)71(COLUMN)35 Columbus(COLUMN)56(COLUMN)32 Del.-Ft. Worths(COLUMN)90(COLUMN)55 Dayton(COLUMN)55(COLUMN)36 Denver(COLUMN)80(COLUMN)44 Des Molnes(COLUMN)64(COLUMN)41 Detroit(COLUMN)56(COLUMN)34 Duluth(COLUMN)59(COLUMN)45 El Paso(COLUMN)83(COLUMN)52 Fairbanks(COLUMN)17(COLUMN)42 Fargo(COLUMN)71(COLUMN)42 Flagstaff(COLUMN)71(COLUMN)35 Great Fall(COLUMN)72(COLUMN)36 Hartford(COLUMN)60(COLUMN)50 Helena(COLUMN)66(COLUMN)40 Honolulu(COLUMN)88(COLUMN)77 Houston(COLUMN)88(COLUMN)66 Indianappolis(COLUMN)58(COLUMN)33 Jackson, Miss.(COLUMN)81(COLUMN)48 Jacksonville(COLUMN)78(COLUMN)46 Juneau(COLUMN)42(COLUMN)36 Kansas City(COLUMN)68(COLUMN)43 Las Vegas(COLUMN)79(COLUMN)59 LIttle Rock(COLUMN)73(COLUMN)50 Los Angeles(COLUMN)67(COLUMN)55 Louisville(COLUMN)61(COLUMN)38 Memphis(COLUMN)72(COLUMN)44 Miami Beach(COLUMN)85(COLUMN)66 Midland-Odessa(COLUMN)85(COLUMN)55 Milwaukee(COLUMN)53(COLUMN)38 Mols.-St. Paul(COLUMN)61(COLUMN)40 Nashville(COLUMN)63(COLUMN)38 New Orleans(COLUMN)63(COLUMN)63 New York(COLUMN)58(COLUMN)50 Norfolk(COLUMN)68(COLUMN)48 North Platte(COLUMN)81(COLUMN)40 Oklahoma City(COLUMN)82(COLUMN)52 Omaha(COLUMN)69(COLUMN)48 O-lando(COLUMN)83(COLUMN)55 Philadelphia(COLUMN)61(COLUMN)42 Phoenix(COLUMN)94(COLUMN)66 Pittsburgh(COLUMN)50(COLUMN)40 Portland, Maine(COLUMN)57(COLUMN)47 Portland, Ore.(COLUMN)64(COLUMN)45 Providence(COLUMN)55(COLUMN)50 Raleigh(COLUMN)68(COLUMN)35 Rapid City(COLUMN)80(COLUMN)43 Reno(COLUMN)76(COLUMN)36 Richmond(COLUMN)67(COLUMN)42 St. Louis(COLUMN)64(COLUMN)38 St. Prbg.-Tampa(COLUMN)82(COLUMN)58 Salt Lake City(COLUMN)79(COLUMN)54 San Francisco(COLUMN)56(COLUMN)54 San Juan(COLUMN)91(COLUMN)76 St. Ste. Marie(COLUMN)57(COLUMN)30 Seattle(COLUMN)53(COLUMN)43 Shreveport(COLUMN)89(COLUMN)56 Sioux Falls(COLUMN)68(COLUMN)50 Spokane(COLUMN)62(COLUMN)38 Syracuse(COLUMN)55(COLUMN)44 Topela(COLUMN)74(COLUMN)40 TuCson(COLUMN)88(COLUMN)62 Tulsa(COLUMN)76(COLUMN)46 Washington(COLUMN)65(COLUMN)51 Wlchitta(COLUMN)76(COLUMN)46(END TABLE) Temperatures Abroad Yesterday(TABLE) City(COLUMN)Weather(COLUMN)Time(COLUMN)temp. Aberdeen(COLUMN)pt. cldy(COLUMN)1 p.m.(COLUMN)59 Amsterdam(COLUMN)pt. cldy(COLUMN)1 p.m.(COLUMN)64 Ankara(COLUMN) clear(COLUMN)3 p.m.(COLUMN)57 Athens(COLUMN) clear(COLUMN)2 p.m.(COLUMN)72 Auckland(COLUMN) cloudy(COLUMN) mid.(COLUMN)59 Berlin(COLUMN) clear(COLUMN)1 p.m.(COLUMN)46 Birmington(COLUMN) smoke(COLUMN)1 p.m.(COLUMN)61 Brussels(COLUMN)pt. cldy(COLUMN)1 p.m.(COLUMN)66 Casablance(COLUMN)pt. cldy(COLUMN) noon(COLUMN)70 Copenhagen(COLUMN) cloudy(COLUMN)1 p.m.(COLUMN)48 Dublin(COLUMN) cloudy(COLUMN)1 p.m.(COLUMN)59 Geneva(COLUMN) cloudy(COLUMN)1 P!m.(COLUMN)52 Hong Kong(COLUMN) clear(COLUMN)8 p.m.(COLUMN)75 Lisbon(COLUMN) cloudy(COLUMN) noon(COLUMN)63 London(COLUMN) cloudy(COLUMN)1 p.m.(COLUMN)64 Amdrid(COLUMN) cloudy(COLUMN)64 Malta(COLUMN) clear(COLUMN)1 p.m.(COLUMN)73 Manila(COLUMN)pt. cldy(COLUMN)8 p.m.(COLUMN)81 Moscow(COLUMN) snow(COLUMN)3 p.m.(COLUMN)25 New Delhi(COLUMN) clear(COLUMN)5 p.m.(COLUMN)84 Nice(COLUMN) clear(COLUMN)1 p.m.(COLUMN)70 Oslo(COLUMN) rain(COLUMN)1 p.m.(COLUMN)46 Paris(COLUMN)pt. cldy(COLUMN)1 p.m.(COLUMN)70 Peking(COLUMN) clear(COLUMN)8 p.m.(COLUMN)57 Rome(COLUMN) cloudy(COLUMN)1 p.m.(COLUMN)70 Saigon(COLUMN)pt. cldy(COLUMN)8 p.m.(COLUMN)81 Sofia(COLUMN) clear(COLUMN)9 p.m.(COLUMN)61 Stockholm(COLUMN) cloudy(COLUMN)1 p.m.(COLUMN)46 Sydney(COLUMN) clear(COLUMN)10p.m.(COLUMN)63 Tel Avlv(COLUMN)pt. cldy(COLUMN)2 p.m.(COLUMN)72 Tokyo(COLUMN) clear(COLUMN)9 p.m.(COLUMN)57 Tunis(COLUMN) clear(COLUMN)1 p.m.(COLUMN)79 Vienna(COLUMN) clear(COLUMN)1 p.m.(COLUMN)50 Warsaw(COLUMN) cloudy(COLUMN)1 p.m.(COLUMN)46(END TABLE) Temperatures (Western Hemisphere)(TABLE) City(COLUMN)Weather(COLUMN)High(COLUMN)Low Acapulco(COLUMN) clear(COLUMN)90(COLUMN)77 Barbados(COLUMN)pt. cldy(COLUMN)82(COLUMN)72 Bermuda(COLUMN) rain(COLUMN)80$73 Bogota(COLUMN) cloudy(COLUMN)68(COLUMN)52 Calgary(COLUMN) Cloudy(COLUMN)54(COLUMN)32 Edmonton(COLUMN) clear(COLUMN)52(COLUMN)18 Havana(COLUMN) cloudy(COLUMN)82(COLUMN)75 Kingston(COLUMN) cloudy(COLUMN)90(COLUMN)77 Montego Bay(COLUMN)pt. cldy(COLUMN)88(COLUMN)75 Mexico City(COLUMN) haze(COLUMN)73(COLUMN)50 Monterrey(COLUMN)pt. cldy(COLUMN)82(COLUMN)58 Montreal(COLUMN) cloudy(COLUMN)57(COLUMN)43 Nassau(COLUMN) clear(COLUMN)82(COLUMN)68 Ottawa(COLUMN) clear(COLUMN)55(COLUMN)37 Regina(COLUMN)pt. cldy(COLUMN)68(COLUMN)30 St. Kitts clear(COLUMN)89(COLUMN)76 Toronto(COLUMN) clear(COLUMN)55(COLUMN)36 Varacruz(COLUMN) clear(COLUMN)54(COLUMN)36 Veracruz(COLUMN)pt. cldy(COLUMN)86(COLUMN)72 Winnipeg(COLUMN) clear(COLUMN)66(COLUMN)37(END TABLE)