Washington: Today - Partly cloudy, high in low 80s, lows in mid to upper 60s. Chance of rain is 10 per cent through tonight. Saturday - Partly cloudy, high in low 80s.

Maryland and Virginia: Today - Partly cloudy, highs in 70s to near 80, lows in 60s. Saturday - Partly cloudy, highs near 80.

Lower Potomac and Chesapeake Bay: Today - Partly cloudy skies with fair visibility through tonight. Winds should be southeasterly at up to 15 knots today and 5 to 10 knots tonight.

Extended Area Outlook: For Sunday through Tuesday - Fair through Monday with chance of rain Tuesday. Highs should average from upper 70s to mid 80s, lows in 60s through period. Washington's normal temperature range for this time of year is from a high of 81 to a low of 62.

West Virginia: Today - Partly cloudy with chance of rain, highs in 70s to mid 80s, lows in upper 50s to mid 60s. Saturday - Partly cloudy with chance of rain, highs in upper 60s to low 80s.

The National Weather Forecast for Today - Scattered showers and thundershowers will cover Florida, eastern Georgia and the Carolina and stretch from east Texas and Louisiana through the Gulf Coast region. They will also be found from the upper Mississippi Valley across the upper Great Lakes region. The rest of the country will have mostly sunny skies. The northern intermountain region, the Rockies and the northern half of the Great Plains will have mild temperatures. The rest of the nation will be seasonably warm but with hot spots over the southwest deserts.

ALMANAC Data for Sept. 10, 1977. Sunrises 6:45 a.m., sets 7:25 p.m.; room rises 6:55 a.m., sets 5:40 p.m. Tides: High 6:23 a.m. and 6:52 p.m. Low 1:24 p.m. High and low tides at the following locations can be obtained by subtracting the hours indicated from the tides above: Annapolis (3 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). Pollen counts 104 Ragweed (note: 7 or high is considered undesirable.)

The Council of Governments' Air Quality Index for yesterday showed the high reading in the Washington area during the 2 to 3 p.m. period was 31 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 in individuals with lung, heart and eye ailments are urged to restrict their activity. The forecast for today indicates that the air quality will improve. Temps and Humidity(TABLE) Time(COLUMN)T.(COLUMN)H. 12 midnight(COLUMN)73(COLUMN)71 1 a.m.(COLUMN)73(COLUMN)74 2 a.m.(COLUMN)71(COLUMN)79 3 a.m.(COLUMN)71(COLUMN)79 4 a.m.(COLUMN)71(COLUMN)79 5 a.m.(COLUMN)70(COLUMN)81 6 a.m.(COLUMN)70(COLUMN)79 7 a.m.(COLUMN)70(COLUMN)79 8 a.m.(COLUMN)70(COLUMN)73 9 a.m.(COLUMN)70(COLUMN)73 10 a.m.(COLUMN)71(COLUMN)71 11 a.m.(COLUMN)74(COLUMN)66 12 noon(COLUMN)76(COLUMN)62 1 p.m.(COLUMN)77(COLUMN)60 2 p.m.(COLUMN)77(COLUMN)60 3 p.m.(COLUMN)78(COLUMN)58 4 p.m.(COLUMN)78(COLUMN)58 5 p.m.(COLUMN)77(COLUMN)58 6 p.m.(COLUMN)76(COLUMN)60(END TABLE) Temperatures ending 8 a.m. (EDT) Yesterday(TABLE) City(COLUMN)H.(COLUMN)L. Albany(COLUMN)78(COLUMN)52 Albuquerque(COLUMN)83(COLUMN)65 Amarillo(COLUMN)86(COLUMN)64 Anchorage(COLUMN)54(COLUMN)50 Asheville(COLUMN)72(COLUMN)65 Atlanta(COLUMN)82(COLUMN)69 Atlantic City(COLUMN)75(COLUMN)60 Austin(COLUMN)92(COLUMN)71 Baltimore(COLUMN)79(COLUMN)66 Billings(COLUMN)90(COLUMN)57 Birmingham(COLUMN)76(COLUMN)70 Bismarck(COLUMN)76(COLUMN)57 Boise(COLUMN)92(COLUMN)55 Boston(COLUMN)71(COLUMN)57 Brownsville(COLUMN)94(COLUMN)76 Buffalo(COLUMN)73(COLUMN)54 Burlington, Vt.(COLUMN)66(COLUMN)45 Casper(COLUMN)91(COLUMN)67 Ch'leston, S.C.(COLUMN)91(COLUMN)80 Ch'eston, W.Va.(COLUMN)79(COLUMN)65 Charlotte, N.C.(COLUMN)85(COLUMN)71 Cheyenne(COLUMN)87(COLUMN)57 Chicago(COLUMN)80(COLUMN)58 Cincinnati(COLUMN)84(COLUMN)61 Cleveland(COLUMN)76(COLUMN)54 Columbia, S.C.(COLUMN)90(COLUMN)72 Columbus, Ohio(COLUMN)81(COLUMN)57 Dal.-Ft. Worth(COLUMN)91(COLUMN)69 Dayton(COLUMN)84(COLUMN)54 Denver(COLUMN)93(COLUMN)63 Des Moines(COLUMN)83(COLUMN)67 Detroit(COLUMN)85(COLUMN)61 Duluth(COLUMN)59(COLUMN)49 El Paso(COLUMN)90(COLUMN)61 Fairbanks(COLUMN)59(COLUMN)48 Fargo(COLUMN)68(COLUMN)59 Flagstaff(COLUMN)89(COLUMN)50 Great Falls(COLUMN)90(COLUMN)49 Hartford(COLUMN)76(COLUMN)54 Helena(COLUMN)87(COLUMN)51 Honolulu(COLUMN)89(COLUMN)76 Houston(COLUMN)93(COLUMN)72 Indianapolis(COLUMN)86(COLUMN)62 Jackson, Miss.(COLUMN)90(COLUMN)70 Jacksonville(COLUMN)94(COLUMN)75 Juneau(COLUMN)53(COLUMN)50 Kansas City(COLUMN)85(COLUMN)66 Las Vegas(COLUMN)108(COLUMN)79 ittle Rock(COLUMN)89(COLUMN)71 Los Angeles(COLUMN)95(COLUMN)70 Louisville(COLUMN)82(COLUMN)68 Memphis(COLUMN)92(COLUMN)73 Miami Beach(COLUMN)86(COLUMN)81 Midland(COLUMN)89(COLUMN)65 Milwaukee(COLUMN)67(COLUMN)54 Mpls.-St. Paul(COLUMN)67(COLUMN)61 Nashville(COLUMN)85(COLUMN)70 New Orleans(COLUMN)88(COLUMN)73 New York(COLUMN)78(COLUMN)65 Norfolk(COLUMN)85(COLUMN)73 North Platte(COLUMN)85(COLUMN)64 Oklahoma City(COLUMN)88(COLUMN)67 Omaha(COLUMN)83(COLUMN)68 Orlando(COLUMN)93(COLUMN)75 Philadelphia(COLUMN)78(COLUMN)62 Phoenix(COLUMN)109(COLUMN)85 Pittsburgh(COLUMN)80(COLUMN)59 Portland, Me.(COLUMN)71(COLUMN)46 Portland, Ore.(COLUMN)75(COLUMN)48 Providence(COLUMN)75(COLUMN)56 Raleigh(COLUMN)84(COLUMN)70 Rapid City(COLUMN)82(COLUMN)62 Reno(COLUMN)93(COLUMN)49 Richmond(COLUMN)84(COLUMN)70 St. Louis(COLUMN)88(COLUMN)66 St. Pbg-Tampa(COLUMN)91(COLUMN)78 Salt Lake City(COLUMN)96(COLUMN)64 San Antonio(COLUMN)90(COLUMN)71 San Diego(COLUMN)85(COLUMN)73 San Francisco(COLUMN)67(COLUMN)54 San Juan, P.R.(COLUMN)88(COLUMN)77 St. Ste. Marie(COLUMN)60(COLUMN)40 Seattle(COLUMN)72(COLUMN)50 Shreveport(COLUMN)91(COLUMN)70 Sioux Falls(COLUMN)84(COLUMN)70 Spokane(COLUMN)76(COLUMN)45 Syracuse(COLUMN)70(COLUMN)49 Topeka(COLUMN)90(COLUMN)65 Tucson(COLUMN)101(COLUMN)77 Tulsa(COLUMN)86(COLUMN)67 Washington(COLUMN)79(COLUMN)69 Wichita(COLUMN)86(COLUMN)67(END TABLE) Temperatures Abroad Yesterday(TABLE) City(COLUMN)Weather(COLUMN)Time(COLUMN)T Aberdeen(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)54 Amsterdam(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)63 Ankara(COLUMN)pt. cldy(COLUMN)3 p.m.(COLUMN)77 Athens(COLUMN)pt. cldy(COLUMN)2 p.m.(COLUMN)84 Auckland(COLUMN)cloudy(COLUMN)midnight(COLUMN)45 Berlin(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)61 Birmingham(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)61 Brussels(COLUMN)rain(COLUMN)1 p.m.(COLUMN)59 Cairo(COLUMN)clear(COLUMN)2 p.m.(COLUMN)90 Casablanca(COLUMN)pt. cldy(COLUMN)noon(COLUMN)77 Copenhagen(COLUMN)pt. cldy(COLUMN)1 p.m.(COLUMN)63 Dublin(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)54 Geneva(COLUMN)clear(COLUMN)1 p.m.(COLUMN)75 Hong Kong(COLUMN)storm(COLUMN)8 p.m.(COLUMN)77 Lisbon(COLUMN)haze(COLUMN)noon(COLUMN)81 London(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)57 Madrid(COLUMN)clear(COLUMN)1 p.m.(COLUMN)82 Malta(COLUMN)clear(COLUMN)1 p.m.(COLUMN)82 Manila(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)82 Moscow(COLUMN)rain(COLUMN)3 p.m.(COLUMN)57 New Delhi(COLUMN)storm(COLUMN)5 p.m.(COLUMN)84 Nice(COLUMN)clear(COLUMN)1 p.m.(COLUMN)75 Oslo(COLUMN)pt. cldy(COLUMN)1 p.m.(COLUMN)61 Paris(COLUMN)rain(COLUMN)1 p.m.(COLUMN)61 Peking(COLUMN)clear(COLUMN)8 p.m.(COLUMN)73 Rome(COLUMN)clear(COLUMN)1 p.m.(COLUMN)79 Saigon(COLUMN)storm(COLUMN)8 p.m.(COLUMN)81 Sofia(COLUMN)clear(COLUMN)2 p.m.(COLUMN)75 Stockholm(COLUMN)clear(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)86 Tokyo(COLUMN)cloudy(COLUMN)9 p.m.(COLUMN)75 Tunis(COLUMN)clear(COLUMN)1 p.m.(COLUMN)81 Vienna(COLUMN)pt. cldy(COLUMN)1 p.m.(COLUMN)75 Warsaw(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)59(END TABLE) Temperatures (Western Hemisphere)(TABLE) City(COLUMN)Weather(COLUMN)High(COLUMN)Low Acapulco(COLUMN)fair(COLUMN)91(COLUMN)72 Barbados(COLUMN)pt. cldy(COLUMN)86(COLUMN)75 Bermuda(COLUMN)cloudy(COLUMN)88(COLUMN)77 Calgary(COLUMN)clear(COLUMN)63(COLUMN)39 Cullacon(COLUMN)pt. cldy(COLUMN)95(COLUMN)79 Edmonton(COLUMN)clear(COLUMN)64(COLUMN)37 Havana(COLUMN)fair(COLUMN)38(COLUMN)77 Kingston(COLUMN)fair(COLUMN)90(COLUMN)82 Montego Bay(COLUMN)fair(COLUMN)90(COLUMN)77 Mexico City(COLUMN)haze(COLUMN)79(COLUMN)55 Monterrey(COLUMN)fair(COLUMN)91(COLUMN)73 Montreal(COLUMN)clear(COLUMN)66(COLUMN)43 Nassau(COLUMN)pt. cldy(COLUMN)91(COLUMN)77 Ottawa(COLUMN)pt. cldy(COLUMN)63(COLUMN)48 Regina(COLUMN)cloudy(COLUMN)75(COLUMN)55 St. Kitts(COLUMN)pt. cldy(COLUMN)89(COLUMN)76 St. Thomas(COLUMN)fair(COLUMN)90(COLUMN)79 Toronto(COLUMN)cloudy(COLUMN)68(COLUMN)55 Vancouver(COLUMN)cloudy(COLUMN)68(COLUMN)50 Veracruz(COLUMN)cloudy(COLUMN)86(COLUMN)75 Winnipeg(COLUMN)storm(COLUMN)70(COLUMN)55(END TABLE)