Washington: Today - Mostly sunny and less humid, highs in mid 80s, lows near 60; Chance of rain 10 percent today, near zero tonight. Sunday Sunny, high near 80.

Maryland: Today - Mostly sunny and less humid, highs in 70s to mid 80s, lows from near 50 in west to rear 60 in east. Sunday - Sunny, highs ranging from near 70 in west to near 80 in east.

Virginia: Today - Mostly sunny, highs in 70s to mid 80s, lows in 50s to near 60. Sunday - Sunny, highs in 70s to near 80.

Lower Potomac and Chesapeake Bay: Today - Sunny today with good visibility and northwesterly winds ta 10 to 20 knots through tonight.

Extended Area Outlook: For Monday through Wednesday - Chance of afternoon or evening showers Monday, fair on Tuesday followed by cloudy skies and chance of rain on Wednesday. Highs should range from Monday's in low 80s to Tuesday's and Wednesday's in 70s, lows should be in 50s to mid 60s through period. Washington's normal temperature range for this time of year is from 81 to 62.

West Virginia: Today - Partly cloudy, highs in 70s to near 80, lows in 40s to low 50s. Sunday - Sunny, highs in 70s.

The National Weather Forecast for Today - Showers and thunderstorms will be scattered from east Texas and the lower Mississippi Valley across the south Atlantic Coast states and northward over the remaining Arizona. Elsewhere most skies will be sunny. It will be cool from Montana across North Dakota into northern Minnesota. Except for warm temperatures along the Pacific Coast, the southwest deserts and also from Texas through the Gulf and south Atlantic Coast states, the rest of the nation will have mid readings.

The Council of Government Air Quality Index for yesterday showed the high reading in the Washington area during the 2 to 3 p.m. period was 6 fro the pollutant, photochemical oxidants. Index values between 0 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 remain about the same.

The National Weather Service forecasts the Potomac River stage at Little Falls should remain near 2.7 feet through today.

Washington data at 8 p.m. (EDT) yesterday: Highest temperature since 8 a.m. yesterday, 71 degrees at 4:40 p.m. Lowest temperature since midnight, 65 degrees at 4:10 a.m. Excess of temperature since Sept. 1, 42 degrees. Excess of temperature since Jan. 1, 578 degrees. Record low temperature for today, 44 degrees in 1893. Relative humidity: Maximum, 87 per cent at 6 a.m.; Minimum, 81 per cent at 2 a.m. 24 hour precipitation, 0.7 inches. Deficiency of precipitation since Sept. 1, 95 inches. Deficiency of precipitation since Jan. 1 7.36 inches. Highest observed wind since 8 a.m. 15 miles per hour from the N.R. at 20 miles per hour from the N.E. at 2:56 a.m. Local Temp., Humidity(TABLE) Time(COLUMN) T.(COLUMN) H. 12 mid.(COLUMN)69(COLUMN)73 1 a.m.(COLUMN)68(COLUMN)76 2 a.m.(COLUMN)67(COLUMN)81 3 a.m.(COLUMN)67(COLUMN)81 4 a.m.(COLUMN)66(COLUMN)84 5 a.m.(COLUMN)66(COLUMN)84 6 a.m.(COLUMN)66(COLUMN)87 7 a.m.(COLUMN)66(COLUMN)87 8 a.m.(COLUMN)68(COLUMN)81 9 a.m.(COLUMN)68(COLUMN)81 10 a.m.(COLUMN)69(COLUMN)81 11 a.m.(COLUMN)69(COLUMN)81 12 noon(COLUMN)68(COLUMN)81 1 p.m.(COLUMN)70(COLUMN)81 2 p.m.(COLUMN)70(COLUMN)81 3 p.m.(COLUMN)70(COLUMN)81 4 p.m.(COLUMN)70(COLUMN)87 5 p.m.(COLUMN)71(COLUMN)84 6 p.m.(COLUMN)71(COLUMN)87(END TABLE) Temperatures ending 8 a.m. (EDT) yesterday.(TABLE) City(COLUMN) H.(COLUMN) L. Albany(COLUMN)80(COLUMN)57 Albuquerque(COLUMN)90(COLUMN)63 Amarillo(COLUMN)88(COLUMN)63 Anchorage(COLUMN)59(COLUMN)52 Asheville(COLUMN)73(COLUMN)66 Atlanta(COLUMN)80(COLUMN)66 Atlanta City(COLUMN)74(COLUMN)61 Austin(COLUMN)87(COLUMN)70 Baltimore(COLUMN)81(COLUMN)63 Billings(COLUMN)64(COLUMN)42 Birmingham(COLUMN)85(COLUMN)68 Bismarck(COLUMN)78(COLUMN)48 Boise(COLUMN)72(COLUMN)45 Boston(COLUMN)67(COLUMN)59 Brownsville(COLUMN)94(COLUMN)78 Buffalo(COLUMN)76(COLUMN)63 Burlington, Vt.(COLUMN)70(COLUMN)51 Casper(COLUMN)87(COLUMN)33 Charleston, W. Va.(COLUMN)86(COLUMN)60 Cheyenne(COLUMN)85(COLUMN)37 Chicago(COLUMN)81(COLUMN)68 Cincinnati(COLUMN)83(COLUMN)63 Cleveland(COLUMN)78(COLUMN)63 Columbia, S.C.(COLUMN)84(COLUMN)70 Columbus, Ohio(COLUMN)80(COLUMN)63 Dal. Ft. Worth(COLUMN)85(COLUMN)69 Dayton(COLUMN)84(COLUMN)64 Denver(COLUMN)93(COLUMN)48 Detroit(COLUMN)82(COLUMN)59 Duluth(COLUMN)73(COLUMN)55 El Paso(COLUMN)91(COLUMN)59 Fairbanks(COLUMN)51(COLUMN)48 Fargo(COLUMN)82(COLUMN)54 Flagstaff(COLUMN)88(COLUMN)50 Great Falls(COLUMN)64(COLUMN)43 Hartford(COLUMN)77(COLUMN)53 Helena(COLUMN)66(COLUMN)36 Honolulu(COLUMN)86(COLUMN)76 Houston(COLUMN)86(COLUMN)76 Indianapolis(COLUMN)85(COLUMN)58 Jackson, Miss.(COLUMN)89(COLUMN)74 Jacksonville(COLUMN)93(COLUMN)74 Juneau(COLUMN)53(COLUMN)50 Kansas City(COLUMN)85(COLUMN)64 Las Vegas(COLUMN)106(COLUMN)80 ittle Rock(COLUMN)90(COLUMN)71 Los Angeles(COLUMN)91(COLUMN)67 Louisville(COLUMN)85(COLUMN)65 Memphis(COLUMN)93(COLUMN)73 Miami Beach(COLUMN)87(COLUMN)80 Midland(COLUMN)92(COLUMN)69 Milwaukee(COLUMN)73(COLUMN)66 Mpis. St. Paul(COLUMN)85(COLUMN)56 Nashville(COLUMN)86(COLUMN)65 New Orleans(COLUMN)89(COLUMN)72 New York(COLUMN)77(COLUMN)63 Norfolk(COLUMN)74(COLUMN)71 North Platte(COLUMN)94(COLUMN)37 Oklahoma City(COLUMN)89(COLUMN)65 Omaha(COLUMN)85(COLUMN)52 Orlando(COLUMN)93(COLUMN)74 Philadelphia(COLUMN)78(COLUMN)60 Phoenix(COLUMN)107(COLUMN)87 Pittsburgh(COLUMN)79(COLUMN)56 Portland, Me.(COLUMN)67(COLUMN)43 Portland, Ore.(COLUMN)74(COLUMN)52 Providence(COLUMN)75(COLUMN)51 Raleigh(COLUMN)72(COLUMN)67 Rapid City(COLUMN)86(COLUMN)41 Reno(COLUMN)87(COLUMN)44 Richmond(COLUMN)75(COLUMN)68 St. Louis(COLUMN)86(COLUMN)69 St. Prbg-Tampa(COLUMN)91(COLUMN)81 Salt Lake City(COLUMN)84(COLUMN)49 San Antonio(COLUMN)90(COLUMN)73 San Diego(COLUMN)82(COLUMN)70 San Francisco(COLUMN)66(COLUMN)54 San Juan. P.R.(COLUMN)87(COLUMN)76 St. Ste. Marie(COLUMN)63(COLUMN)56 Seattle(COLUMN)69(COLUMN)52 Shreveport(COLUMN)83(COLUMN)65 Sioux Falls(COLUMN)87(COLUMN)51 Spokane(COLUMN)68(COLUMN)45 Syracuse(COLUMN)72(COLUMN)57 Topeka(COLUMN)90(COLUMN)67 Tuscon(COLUMN)100(COLUMN)77 Tulsa(COLUMN)87(COLUMN)69 Washington(COLUMN)79(COLUMN)65 Wichita(COLUMN)90(COLUMN)68(END TABLE) Temperatures Abroad Yesterday(TABLE) City(COLUMN) Weather(COLUMN) Time(COLUMN) Temp. Aberdeen(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)52 Amsterdaym(COLUMN)clear(COLUMN)1 p.m.(COLUMN)61 Ankara(COLUMN)rain(COLUMN)3 p.m.(COLUMN)77 Athens(COLUMN)clear(COLUMN)2 p.m.(COLUMN)86 Auckland(COLUMN)cloudy(COLUMN)mid.(COLUMN)45 Berlin(COLUMN)pt. cldy(COLUMN)1 p.m.(COLUMN)59 B'ham(COLUMN)pt. cldy(COLUMN)1 p.m.(COLUMN)57 Brussels(COLUMN)pt. cldy(COLUMN)1 p.m.(COLUMN)57 Cairo(COLUMN)clear(COLUMN)2 p.m.(COLUMN)90 Casablanca(COLUMN)pt. cldy(COLUMN)noon(COLUMN)84 Copenhagen(COLUMN)pt. cldy(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)64 Hong Kong(COLUMN)pt. cldy(COLUMN)8 p.m.(COLUMN)82 Lisbon(COLUMN)clear(COLUMN)noon(COLUMN)82 London(COLUMN)clear(COLUMN)1 p.m.(COLUMN)59 Madrid(COLUMN)clear(COLUMN)1 p.m.(COLUMN)86 Maita(COLUMN)clear(COLUMN)1 p.m.(COLUMN)82 Manila(COLUMN)pt. cldy(COLUMN)8 p.m.(COLUMN)81 Moscow(COLUMN)pt. cldy(COLUMN)3 p.m.(COLUMN)66 New Delhi(COLUMN)pt. cldy(COLUMN)5 p.m.(COLUMN)90 Nice(COLUMN)clear(COLUMN)1 p.m.(COLUMN)75 Oslo(COLUMN)clear(COLUMN)1 p.m.(COLUMN)59 Paris(COLUMN)clear(COLUMN)1 p.m.(COLUMN)63 Peking(COLUMN)cloudy(COLUMN)8 p.m.(COLUMN)72 Rome(COLUMN)pt. cldy(COLUMN)1 p.m.(COLUMN)79 Saigon(COLUMN)drizzle(COLUMN)8 p.m.(COLUMN)77 Sofia(COLUMN)clear(COLUMN)2 p.m.(COLUMN)77 Stockholm(COLUMN)pt. cldy(COLUMN)1 p.m.(COLUMN)57 Sydney(COLUMN)clear(COLUMN)10 p.m.(COLUMN)55 Tel Aviv(COLUMN)pt. cldy(COLUMN)2 p.m.(COLUMN)84 Tokyo(COLUMN)rain(COLUMN)9 p.m.(COLUMN)79 Tunis(COLUMN)clear(COLUMN)1 p.m.(COLUMN)86 Vienna(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)55 Warsaw(COLUMN)rain(COLUMN)1 p.m.(COLUMN)54(END TABLE) Temperatures (Western Hemisphere)(TABLE) City(COLUMN)Weather(COLUMN)High(COLUMN)Low Acapulco(COLUMN)clear(COLUMN)91(COLUMN)78 Barbados(COLUMN)pt. cldy(COLUMN)86(COLUMN)80 Bermuda(COLUMN)pt. cldy(COLUMN)86(COLUMN)76 Calcary(COLUMN)pt. cldy(COLUMN)64(COLUMN)34 Edmonton(COLUMN)clear(COLUMN)63(COLUMN)37 Hayana(COLUMN)pt. cldy(COLUMN)88(COLUMN)77 Kingston(COLUMN)pt. cldy(COLUMN)91(COLUMN)77 Montego Bay(COLUMN)pt. cldy(COLUMN)90(COLUMN)76 Mexico City(COLUMN)pt. cldy(COLUMN)79(COLUMN)90 Monterrey(COLUMN)pt. cldy(COLUMN)91(COLUMN)79 Montreal(COLUMN)pt. cldy(COLUMN)68(COLUMN)52 Nassau(COLUMN)pt. cldy(COLUMN)91(COLUMN)74 Ottawa(COLUMN)cloudy(COLUMN)68(COLUMN)48 Regina(COLUMN)clear(COLUMN)61(COLUMN)36 St. Kitts(COLUMN)pt. cldy(COLUMN)88(COLUMN)79 St. Thomas(COLUMN)pt. cldy(COLUMN)89(COLUMN)89 Toronto(COLUMN)cloudy(COLUMN)68(COLUMN)52 Vancouver(COLUMN)clear(COLUMN)64(COLUMN)50 Veracruz(COLUMN)pt. cldy(COLUMN)88(COLUMN)74 Winnipeg(COLUMN)rain(COLUMN)64(COLUMN)52(END TABLE)