Washington: Today - Sunny, high in the mid 60s, low in the low 40s. The chance of rain is near zero today and 10 per cent tonight. Saturday - Chance of rain, high near 70.

Maryland and Virginia: Today - Sunny, highs from the 50s to the low 60s, lows from the 30s to the 40s. Saturday - Chance of rain highs from the 60s to low 70s.

West Virginia: Today - Sunny, highs from the upper 50s to the upper 60s, lows from the mid 20s to the mid 30s. Saturday - Rain, highs from the 60s to the low 70s.

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

Extended Area Forcast for Sunday through Tuesday: Chance of rain on Sunday and Monday, partly cloudy on Tuesday. Highs will be in the 60s, lows from the upper 40s to the 50s. Normal Washington temperatures for the period are a high of 63 and a low of 42.

The National Weather Forecast for today - Showers will scatter from the upper Great Lakes through the Mississippi Valley into Oklahoma and eastern Kansas. In addition, thundershowers will scatter the Gull coast. Scattered showers, with snow over the mountains, will stretch from the Pacific northwest into the northern and central Rockies. Skies will be sunny or mostly sunny elsewhere. It will be cooler through the Atlantic Coast and warmer in the middle Mississippi Valley. The rest of the nation will have seasonable or near seasonable temperatures.

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 7 for the pollution, photochemical oxidants. Index values between zero and 24 indicate good air quality. When the index exceeds 100 the air becomes hazardous and persons with lung, heart and eye problems should restrict their activity. The foreast for today indicates the air quality will be good.

The National Weather Service forecasts that the Potomac River stage at Little Falls will be near 4.8 feet.

Washington data at 7 p.m. (EST) yesterday: Highest temperatures since 7 a.m. yesterday, 69 degrees at 9:30 a.m. Lowest temperatures since midnight, 62 degrees at 2:40 a.m. Excess of temperature since March 1, 243 degrees. Deficiency of temperatures since Jan. 1, 14 degrees. Record high temperature for today, 83 degrees in 1977. Record low temperature for today, 15 degrees in 1923. Relative humidity: Maximum, 97 per cent at 3 a.m.; Minimum, 26 per cent at 2 p.m. Deficiency of precipitation since March 1, 1.16 inches. Deficiency of precipitation since Jan, 1, 4.07 inches. Highest observed wind since 7 a.m. 29 miles per hour from the northwest at 1 p.m. Peak gust since 7 a.m., 44 miles per hour from the northwest at 12:16 p.m. Local Temp., Humidity(TABLE) Time(COLUMN)T.(COLUMN)H. 12 m'ngt(COLUMN)66(COLUMN)81 1 a.m.(COLUMN)65(COLUMN)87 2 a.m.(COLUMN)65(COLUMN)87 3 a.m. (COLUMN)62(COLUMN)97 4 a.m.(COLUMN)63(COLUMN)93 5 a.m.(COLUMN)63(COLUMN)93 6 a.m.(COLUMN)64(COLUMN)65 7 a.m.(COLUMN)64(COLUMN)52 8 a.m.(COLUMN)65(COLUMN)42 9 a.m.(COLUMN)68(COLUMN)30 10 a.m.(COLUMN)69(COLUMN)24 11 a.m.(COLUMN)68(COLUMN)28 12 noon(COLUMN)65(COLUMN)29 1 p.m.(COLUMN)65(COLUMN)27 2 p.m.(COLUMN)65(COLUMN)26 3 p.m.(COLUMN)65(COLUMN)26 4 p.m.(COLUMN)64(COLUMN)28 5 p.m.(COLUMN)63(COLUMN)29 6 p.m.(COLUMN)61(COLUMN)31 7 p.m.(COLUMN)60(COLUMN)32(END TABLE) Temperatures ending 8 p.m. (EST) yesterday:(TABLE) City(COLUMN)H.(COLUMN)L. Albany(COLUMN)85(COLUMN)53 Albuquerque(COLUMN)55(COLUMN)36 Amarillo(COLUMN)62(COLUMN)33 Anchorage(COLUMN)35(COLUMN)25 Asheville(COLUMN)67(COLUMN)54 Atlanta(COLUMN)70(COLUMN)60 Atlantic City(COLUMN)78(COLUMN)55 Austin(COLUMN)77(COLUMN)60 Baltimore(COLUMN)85(COLUMN)62 Bilings(COLUMN)31(COLUMN)23 Birmingham(COLUMN)81(COLUMN)55 Bismarck(COLUMN)42(COLUMN)19 Boise(COLUMN)48(COLUMN)25 Boston(COLUMN)81(COLUMN)52 Brownsville(COLUMN)85(COLUMN)72 Butlalo(COLUMN)76(COLUMN)42 Burlington(COLUMN)80(COLUMN)48 Casper(COLUMN)28(COLUMN)7 Charleston, S.C. 83(COLUMN)64 Ch'I't'n, W.Va.(COLUMN)80(COLUMN)53 Charlotte(COLUMN)66(COLUMN)63 Cheyenne(COLUMN)35(COLUMN)15 Chicago(COLUMN)63(COLUMN)39 Cincinnati(COLUMN)82(COLUMN)39 Cleveland(COLUMN)80(COLUMN)41 Columbia, S.C.(COLUMN)83(COLUMN)60 Columbus(COLUMN)81(COLUMN)41 Dal.-Ft. Worth(COLUMN)73(COLUMN)44 Dayton(COLUMN)80(COLUMN)40 Denver(COLUMN)48(COLUMN)25 Des Moines(COLUMN)48(COLUMN)33 Detroit(COLUMN)76(COLUMN)40 Duluth(COLUMN)34(COLUMN)22 El Paso(COLUMN)69(COLUMN)46 Fairbanks(COLUMN)25(COLUMN)-1 Fargo(COLUMN)32(COLUMN)14 Flagstaff(COLUMN)49(COLUMN)23 Great Falls(COLUMN)34(COLUMN)23 Hartford(COLUMN)87(COLUMN)54 Helena(COLUMN)37(COLUMN)17 Honolulu(COLUMN)82(COLUMN)71 Houston(COLUMN)80(COLUMN)68 Indianapolis(COLUMN)78(COLUMN)40 Jackson, Miss.(COLUMN)85(COLUMN)55 Jacksonville(COLUMN)85(COLUMN)63 Juneau(COLUMN)40(COLUMN)37 Kansas City(COLUMN)51(COLUMN)33 Las Vegas(COLUMN)61(COLUMN)38 Little Rock(COLUMN)78(COLUMN)44 Los Angeles(COLUMN)58(COLUMN)45 Louisville(COLUMN)83(COLUMN)43 Memphis(COLUMN)82(COLUMN)49 Miami Beach(COLUMN)77(COLUMN)75 Midland-Odessa(COLUMN)69(COLUMN)45 Milwaukee(COLUMN)60(COLUMN)39 Mols.-St. Pauls(COLUMN)47(COLUMN)30 Nashville(COLUMN)82(COLUMN)48 New Orleans(COLUMN)84(COLUMN)70 New York(COLUMN)79(COLUMN)55 Norfolk(COLUMN)79(COLUMN)66 North Platte(COLUMN)37(COLUMN)H15 Oklahoma City(COLUMN)68(COLUMN)36 Omaha(COLUMN)49(COLUMN)30 Orlando(COLUMN)86(COLUMN)66 Philadelphia(COLUMN)75(COLUMN)59 Phoenix(COLUMN)75(COLUMN)52 Pittsburgh(COLUMN)80(COLUMN)46 Portland, Ve.(COLUMN)75(COLUMN)H43 Portland, Ore.(COLUMN)63(COLUMN)43 Providences(COLUMN)78(COLUMN)46 Raleigh(COLUMN)71(COLUMN)61 Raoid City(COLUMN)28(COLUMN)13 Reno(COLUMN)45(COLUMN)16 Richmond(COLUMN)81(COLUMN)65 St. Louis(COLUMN)68(COLUMN)36$6LSt. Prbg-Tampa 82(COLUMN)70 Salt Lake City(COLUMN)44(COLUMN)31 San Antonia(COLUMN)81(COLUMN)64 San Diego(COLUMN)60(COLUMN)49 Sam Francisco(COLUMN)57(COLUMN)48 San Juan, P.R.(COLUMN)84(COLUMN)73 A! Ste. Marie(COLUMN)39(COLUMN)24 Seattle(COLUMN)57(COLUMN)42 Shreveport(COLUMN)80(COLUMN)53 Sioux Falls(COLUMN)40(COLUMN)25 Spokane(COLUMN)53(COLUMN)37 Syracuse(COLUMN)85(COLUMN)49 Topeka(COLUMN)56(COLUMN)30 Tucson(COLUMN)74(COLUMN)45 Washington(COLUMN)82(COLUMN)62 Wichita(COLUMN)59(COLUMN)31(END TABLE) Temperatures Abroad Yesterday(TABLE) City(COLUMN)Weather(COLUMN)Time(COLUMN)Tem. Aberdeen(COLUMN)rain(COLUMN)1 p.m.(COLUMN)41 Amsterdam(COLUMN)clear(COLUMN)1 p.m.(COLUMN)41 Ankara(COLUMN)Cloudy(COLUMN)3 p.m.(COLUMN)72 Athens(COLUMN)clear(COLUMN)2 p.m.(COLUMN)70 Auckland(COLUMN)cloudy(COLUMN)midnight(COLUMN)66 Berlin(COLUMN)clear(COLUMN)1 p.m.(COLUMN)30 Birmingham(COLUMN)rain(COLUMN)1 p.m.(COLUMN)47 Brussels(COLUMN)clear(COLUMN)1 p.m.(COLUMN)41 Cairo(COLUMN)cloudy(COLUMN)2 p.m.(COLUMN)92 Casablanca(COLUMN)pt. cldy.(COLUMN)noon(COLUMN)61 Copenhagen(COLUMN)pt. cldy.(COLUMN)1 p.m.(COLUMN)32 Dublin(COLUMN)rain(COLUMN)1 p.m.(COLUMN)54 Geneva(COLUMN)pt. cldy.(COLUMN)1 p.m.(COLUMN)37 Hong Kong(COLUMN)pt. cldy.(COLUMN)1 p.m.(COLUMN)68 Lisbon(COLUMN)Pt. cldy.(COLUMN)noon(COLUMN)61 London(COLUMN)rain(COLUMN)1 p.m.(COLUMN)43 Madrid(COLUMN)clear(COLUMN)1 p.m.(COLUMN)50 Malta(COLUMN)pt. cldy.(COLUMN)1 p.m.(COLUMN)61 Manila(COLUMN)clear(COLUMN)8 p.m.(COLUMN)82 Moscow(COLUMN)clear(COLUMN)3 p.m.(COLUMN)30 New Delhi(COLUMN)cloudy(COLUMN)5 p.m.(COLUMN)95 Nice(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)54 Oslo(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)36 Paris(COLUMN)clear(COLUMN)1 p.m.(COLUMN)45 Peking(COLUMN)clear(COLUMN)8 p.m.(COLUMN)63 Rome(COLUMN)pt. cldy.(COLUMN)1 p.m.(COLUMN)59 Saigon(COLUMN)clear(COLUMN)8 p.m.(COLUMN)54 Sofia(COLUMN)cloudy(COLUMN)2 p.m.(COLUMN)59 Stockholm(COLUMN)clear(COLUMN)1 p.m.(COLUMN)39 Sydney(COLUMN)clear(COLUMN)10 p.m.(COLUMN)73 Tel Aviv(COLUMN)clear(COLUMN)2 p.m.(COLUMN)72 Tokyo(COLUMN)cloudy(COLUMN)9 p.m.(COLUMN)55 Tunis(COLUMN)pt. cldy.(COLUMN)1 p.m.(COLUMN)51 Vienna(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)36 Warsaw(COLUMN)snow(COLUMN)1 p.m.(COLUMN)28(END TABLE) Temperatures (Western Hemisphere)(TABLE) City(COLUMN)Weather(COLUMN)High(COLUMN)Low Acapulco(COLUMN)clear(COLUMN)855(COLUMN)72 Barbados(COLUMN)pt. cldy(COLUMN)83(COLUMN)73 Bermuda(COLUMN)cloudy(COLUMN)69(COLUMN)63 Calgary(COLUMN)pt. cldy(COLUMN)48(COLUMN)25 Culiacan(COLUMN)clear(COLUMN)85(COLUMN)50 Edmonton(COLUMN)cloudy(COLUMN)45(COLUMN)20 Havana(COLUMN)pt. cldy(COLUMN)88(COLUMN)63 Kingston(COLUMN)pt. cldy(COLUMN)86(COLUMN)72 Mexico City(COLUMN)pt. cldy(COLUMN)86(COLUMN)59 Monterrey(COLUMN)cloudy(COLUMN)36(COLUMN)20 Montreal(COLUMN)pt. cldy(COLUMN)72(COLUMN)45 Nassau(COLUMN)clear(COLUMN)82(COLUMN)66 Ottawa(COLUMN)clear(COLUMN)45(COLUMN)41 Regina(COLUMN)clear(COLUMN)43(COLUMN)18 St. Thomas(COLUMN)pt. cldy(COLUMN)85(COLUMN)71 Toronto(COLUMN)rain(COLUMN)73(COLUMN)39 Vancouver(COLUMN)pt. cldy(COLUMN)50(COLUMN)43 Veracruz(COLUMN)clear(COLUMN)95(COLUMN)70 Winnipeg(COLUMN)clear(COLUMN)39(COLUMN)19(END TABLE)