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

Maryland and Virginia: Today - Sunny highs from the low 60s to near 70, lows from the 30s to the mid 40s. Wednesday - Partly cloudy, high from the 50s to the 60s.

Lower Potomac and Chesapeake Bay: Today - Fair, visibility of more than 5 miles. Winds will from the southwest at near 12 knots this morning, shifting to from the south at from 10 to 15 knots tonight. Waves in unprotected waters will be from 2 to 3 feet.

Extended Area Forecast for Thursday through Saturday: Chance of rain on Thursday, partly cloudy through the remainder of the period. Highs will be from the 50s to the 60s, lows in the 40s. Temperatures will be 5 to 10 degrees colder in the mountains. Normal Washington temperatures for the period area high of 68 and a low of 48.

West Virginia: Today - Partly cloudy, highs from the mid 50s to the mid 60s, lows from the upper 30s to the low 40s. Wednesday - Partly cloudy, highs from the upper 40s to the upper 50s.

The National Weather Forecast for today - There is a chance of snow flurries in northern Maine with scattered rain over much of the Great Lakes, the upper Ohio valley and across the central Appalachians. Sunshine will return to most of the northeast, and partly cloudy or sunny skies will previal over the rest of the nation. It will be mild from the Pacific coast eastward over the Rockies and also over the Gulf coast. It will not be as cold from the upper Ohio valley across the central Appalachians and over the midland south Atlantic coast. The rest of the nation will be cool.

Almanac Data for today - Sun rises 7:20 am., sets 6:26 p.m.; moon rises 2:08 p.m., sets 12:52 a.m. Tides: high 1:07 p.m., low 7:44 a.m and 7:59 p.m. High and low tides at the following locations can be obtained by subtracting the hours indicated from the tides above. Annapolis (1 1/2); Bloody Point Lighthouse (4 1/2; Deale, Md. (4 1/2); Colonial Beach (6); Norfolk (1 1/2); Virginia Beach (1); Solomons 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 19 for the pollutant, photochemical oxidants. Index values between zero and 24 indicate good 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 be good.

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

Washington data at 8 p.m. (EDT) yesterday: Highest temperature since 8 a.m. yesterday 55 degrees at 3:50 p.m. Lowest temperature since midnight, 41 degrees at 6:30 a.M. Deficiency of temperature since October 1, 59 degrees. Excess of temperature since Jan. 1, 382 degrees. Record high temperature for today, 85 degrees in 1938. Record low temperature for today, 34 degrees in 1876. Relative humidity: Maximum, 73 per cent at 6 a.m.; Minimum, 35 per cent at 5 p.m. 24 hour precipitation, 32 inches. Excess of precipation since October 1, 1.92 inches. Deficiency of precipitation since Jan. 1, 7.25 inches. Highest observed wind since 8 a.m. 28 miles per hour from the northwest at 11:53 a.m. Peak gust since 8 a.m., 49 miles per hour from the northwest at 10:37 a.m. Local Temp., Humidity(TABLE) Time(COLUMN)T.(COLUMN)H. 12 mid.(COLUMN)44(COLUMN)71 1 a.m.(COLUMN)44(COLUMN)65 2 a.m.(COLUMN)45(COLUMN)60 3 a.m.(COLUMN)45(COLUMN)58 4 a.m.(COLUMN)45(COLUMN)58 5 a.m.(COLUMN)43(COLUMN)68 6 a.m.(COLUMN)42(COLUMN)73 7 a.m.(COLUMN)42(COLUMN)70 8 a.m.(COLUMN)42(COLUMN)73 9 a.m.(COLUMN)45(COLUMN)58 10 a.m.(COLUMN)47(COLUMN)52 11 a.m.(COLUMN)48(COLUMN)50 12 noon(COLUMN)50(COLUMN)46 1 p.m.(COLUMN)52(COLUMN)43 2 p.m.(COLUMN)53(COLUMN)40 3 p.m.(COLUMN)54(COLUMN)38 4 p.m.(COLUMN)55(COLUMN)37 5 p.m.(COLUMN)54(COLUMN)35 6 p.m.(COLUMN)53(COLUMN)35 7 p.m.(COLUMN)51(COLUMN)38(END TABLE) Temperatures ending 8 a.m. (EDT) Yesterday(TABLE) H.(COLUMN)L. Albany(COLUMN)67(COLUMN)47 Albuquerque(COLUMN)73(COLUMN)45 Amarillo(COLUMN)78(COLUMN)48 Anchorage(COLUMN)39(COLUMN)31 Asheville(COLUMN)53(COLUMN)38 Atlanta(COLUMN)61(COLUMN)37 Atlantic City(COLUMN)64(COLUMN)41 Austin(COLUMN)71(COLUMN)48 Baltimore(COLUMN)60(COLUMN)39 Billings(COLUMN)75(COLUMN)39 Birmingham(COLUMN)59(COLUMN)36 Bismarck(COLUMN)75(COLUMN)43 Boise(COLUMN)72(COLUMN)44 Boston(COLUMN)63(COLUMN)51 Brownsville(COLUMN)85(COLUMN)59 Buffalo(COLUMN)48(COLUMN)36 Burlington(COLUMN)54(COLUMN)46 Casper(COLUMN)78(COLUMN)32 Charl'ton, SC(COLUMN)66(COLUMN)42 Charl'ton WVa(COLUMN)47(COLUMN)31 Charlotte(COLUMN)60(COLUMN)37 Cheyenne(COLUMN)74(COLUMN)37 Chicago(COLUMN)51(COLUMN)33 Cincinnati(COLUMN)48(COLUMN)23 Cleveland(COLUMN)49(COLUMN)40 Columbia, SC(COLUMN)65(COLUMN)34 Columbus(COLUMN)49(COLUMN)26 Dal.-Ft. Worth(COLUMN)71(COLUMN)42 Dayton(COLUMN)48(COLUMN)25 Denver(COLUMN)80(COLUMN)41 Des Moines(COLUMN)59(COLUMN)43 Detroit(COLUMN)45(COLUMN)23 Duluth(COLUMN)56(COLUMN)40 El Paso(COLUMN)75(COLUMN)48 Fairbanks(COLUMN)19(COLUMN)MM Fargo(COLUMN)64(COLUMN)44 Flagstaff(COLUMN)74(COLUMN)34 Great Falls(COLUMN)72(COLUMN)39 Hartford(COLUMN)69(COLUMN)47 Helena(COLUMN)70(COLUMN)37 Honolulu(COLUMN)90(COLUMN)79 Houston(COLUMN)75(COLUMN)56 Indianapolis(COLUMN)52(COLUMN)31 Jackson, Miss.(COLUMN)67(COLUMN)33 Jacksonville(COLUMN)72(COLUMN)37 Juneau(COLUMN)47(COLUMN)46 Kansas City(COLUMN)61(COLUMN)46 Las Vegas(COLUMN)92(COLUMN)59 Little Rock(COLUMN)64(COLUMN)41 Los Angeles(COLUMN)81(COLUMN)60 Louisville(COLUMN)55(COLUMN)33 Memphis(COLUMN)64(COLUMN)38 Miami Beach(COLUMN)84(COLUMN)61 Midland-Odes.(COLUMN)77(COLUMN)49 Milwaukee(COLUMN)47(COLUMN)32 Mpls.-St. Paul(COLUMN)58(COLUMN)38 Nashville(COLUMN)57(COLUMN)31 New Orleans(COLUMN)70(COLUMN)43 New York(COLUMN)65(COLUMN)42 Norfolk(COLUMN)73(COLUMN)43 North Platte(COLUMN)81(COLUMN)35 Okla. City(COLUMN)70(COLUMN)46 Omaha(COLUMN)64(COLUMN)42 Orlando(COLUMN)81(COLUMN)53 Philadelphia(COLUMN)67(COLUMN)38 Phoenix(COLUMN)96(COLUMN)73 Pittsburgh(COLUMN)47(COLUMN)36 Portland, Me.(COLUMN)52(COLUMN)49 Portland, Ore.(COLUMN)67(COLUMN)42 Providence(COLUMN)63(COLUMN)48 Raleigh(COLUMN)55(COLUMN)33 Rapid City(COLUMN)79(COLUMN)42 Reno(COLUMN)82(COLUMN)35 Richmond(COLUMN)63(COLUMN)39 St. Louis(COLUMN)57(COLUMN)35 St. Prog Tam.(COLUMN)81(COLUMN)49 Salt Lake City(COLUMN)77(COLUMN)44 San Antonio(COLUMN)76(COLUMN)45 San Diego(COLUMN)74(COLUMN)64 San. Fran.(COLUMN)61(COLUMN)55 San Juan, P.R.(COLUMN)87(COLUMN)76 St. Ste. Marie(COLUMN)41(COLUMN)24 Seattle(COLUMN)61(COLUMN)47 Shreveport(COLUMN)71(COLUMN)34 Sioux Falls(COLUMN)62(COLUMN)33 Spokane(COLUMN)65(COLUMN)38 Syracuse(COLUMN)51(COLUMN)43 Topeka(COLUMN)66(COLUMN)47 Tucson(COLUMN)90(COLUMN)64 Tulsa(COLUMN)68(COLUMN)45 washington(COLUMN)59(COLUMN)41 Wichita(COLUMN)70(COLUMN)46(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)41 Athens(COLUMN)clear(COLUMN)2 p.m.(COLUMN)49 Auckland(COLUMN)clear(COLUMN)midnight(COLUMN)54 Berlin(COLUMN)haze(COLUMN)1 p.m.(COLUMN)55 Birmingham(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)54 Brussels(COLUMN)clear(COLUMN)1 p.m.(COLUMN)68 Casablanca(COLUMN)cloudy(COLUMN)noon(COLUMN)71 Copenhagen(COLUMN)clear(COLUMN)1 p.m.(COLUMN)55 Dublin(COLUMN)haze(COLUMN)1 p.m.(COLUMN)61 Geneva(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)48 Hong Kong(COLUMN)pt. cldy(COLUMN)8 p.m.(COLUMN)79 Lisbon(COLUMN)cloudy(COLUMN)noon(COLUMN)64 London(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)54 Madrid(COLUMN)pt. cldy(COLUMN)1 p.m.(COLUMN)70 Malta(COLUMN)clear(COLUMN)1 p.m.(COLUMN)72 Manila(COLUMN)cloudy(COLUMN)8 p.m.(COLUMN)81 Moscow(COLUMN)cloudy(COLUMN)3 p.m.(COLUMN)28 New Delhi(COLUMN)clear(COLUMN)5 p.m.(COLUMN)86 Nice(COLUMN)clear(COLUMN)1 p.m.(COLUMN)68 Oslo(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)46 Paris(COLUMN)clear(COLUMN)1 p.m.(COLUMN)63 Peking(COLUMN)clear(COLUMN)8 p.m.(COLUMN)54 Rome(COLUMN)clear(COLUMN)1 p.m.(COLUMN)73 Saigon(COLUMN)pt. cldy(COLUMN)8 p.m.(COLUMN)82 Sofia(COLUMN)clear(COLUMN)2 p.m.(COLUMN)50 Stockholm(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)46 Sydney(COLUMN)clear(COLUMN)10 p.m.(COLUMN)64 Tel Aviv(COLUMN)rain(COLUMN)2 p.m.(COLUMN)68 Tokyo(COLUMN)cloudy(COLUMN)9 p.m.(COLUMN)63 Tunis(COLUMN)clear(COLUMN)1 p.m.(COLUMN)77 Vienna(COLUMN)clear(COLUMN)1 p.m.(COLUMN)57 Warsaw(COLUMN)clear(COLUMN)1 p.m.(COLUMN)52(END TABLE) Temperatures (Western Hemisphere)(TABLE) City(COLUMN)Weather(COLUMN)H.(COLUMN)L. Acapulco(COLUMN)pt. cldy(COLUMN)90(COLUMN)79 Bogota(COLUMN)pt. cldy(COLUMN)68(COLUMN)63 Calgary(COLUMN)clear(COLUMN)61(COLUMN)25 Culiacan(COLUMN)cloudy(COLUMN)93(COLUMN)75 Edmonton(COLUMN)pt. cldy(COLUMN)57(COLUMN)25 Havana(COLUMN)pt. cldy(COLUMN)79(COLUMN)73 Kingston(COLUMN)fair(COLUMN)88(COLUMN)77 Montego Bay(COLUMN)fair(COLUMN)88(COLUMN)76 Mexico City(COLUMN)haze(COLUMN)68(COLUMN)45 Monterrey(COLUMN)fair(COLUMN)79(COLUMN)63 Montreal(COLUMN)rain(COLUMN)43(COLUMN)39 Nassau(COLUMN)pt. cldy(COLUMN)82(COLUMN)74 Ottawa(COLUMN)cloudy(COLUMN)43(COLUMN)39 Regina(COLUMN)clear(COLUMN)64(COLUMN)34 St. Kitts(COLUMN)pt. cldy(COLUMN)88(COLUMN)77 Toronto(COLUMN)cloudy(COLUMN)43(COLUMN)32 Vancouver(COLUMN)pt. cldy(COLUMN)57(COLUMN)39 Veracuz(COLUMN)pt. cldy(COLUMN)82(COLUMN)68 Winnipeg(COLUMN)rain(COLUMN)64(COLUMN)45(END TABLE)