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

Maryland and Virginia: Today - Partly cloudy, highs in 80s to near 90, lows in 60s. Chance of rain in southern Virginia this afternoon through Monday. Monday - Partly cloudy, highs in 80s to near 90.

Lower Potomac and Chesapeake Bay: Today - Fair skies with good to fair visibility and westerly winds at about 15 knots through tonight.

Extended Area Outlook: For Tuesday through Thursday - Chance of rain Tuesday followed by fair skies Wednesday and Thursday. Highs should averaged in 80s, lows in upper 50s to 60s through period. Washington's normal temperature range for this time of year is from 86 to 66.

Atlantic Ocean Beaches from Cape May through Maryland: Today and Monday - Partly cloudy, highs in 80s. Water temperatures should range from low 60s north to mid 60s south.

Atlantic Ocean Beaches from Cape Halteras through Virginia: Today and Monday - Humid, chance of afternoon or evening showers, highs in 80s to near 90. Water temperatures should range from upper 60s north to upper 70s south.

West Virginia: Today - Sunny, highs in mid 70s to mid 80s, lows in 50s to mid 60s. Monday - Partly cloudy, highs in upper 70s to upper 80s.

The National Weather Forecast for Today - It will be mild with rain and showers in the north Atlantic Coast states and the northern Great Lakes. Showers and thunderstorms are expected to be scattered over the remainder of the Atlantic Coast states and through Tennessee, Alabama, Mississippi, Arkansas, Oklahoma and Kansas into eastern Colorado and Wyoming. Elsewhere, it will be mostly sunny. It will be hot, with numerous highs above 100 degrees, from southwest Texas through the desert southwest. It will be mild in the northern pleateau, the northern and central Great Plains and the Ohio Valley regions. Other sections of the nation will be warm.

Almanac data for Sunday June 19, 1977. Sun rises 5:53 a.m., sets 8:17 p.m.; moon rises 8:26 a.m., sets 8:30 p.m. Tides: High 9:29 a.m. and 10:58 p.m., low 5:03 a.m. and 5:37 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); Coloniel 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 1 p.m. period was 63 for the pollutant, photochemical oxidants. Index values between 50 and 99 indicate unhealthy air quality. When the index exceeds 100 the air becomes hazardous and persons with lung, heart and eye problems should restrict their activity.

The National Weather Service forcasts that the Potomac River stage at Little Falls will remain near 3.0 feet through today. Local Temp., Humidity(TABLE) Time(COLUMN)T(COLUMN)H. 12 mid.(COLUMN)70H87 1 a.m.(COLUMN)69(COLUMN)90 2 a.m.(COLUMN)69(COLUMN)87 3 a.m.(COLUMN)69(COLUMN)90 4 a.m.(COLUMN)69(COLUMN)87 5 a.m.(COLUMN)69(COLUMN)87 6 a.m.(COLUMN)70(COLUMN)90 7 a.m.(COLUMN)70(COLUMN)87 8 a.m.(COLUMN)72(COLUMN)81 9 a.m.(COLUMN)72(COLUMN)79 10 a.m.(COLUMN)76(COLUMN)71 11 a.m.(COLUMN)80(COLUMN)63 12 noon(COLUMN)81(COLUMN)61 1 p.m.(COLUMN)84(COLUMN)55 2 p.m.(COLUMN)87(COLUMN)50 3 p.m.(COLUMN)89(COLUMN)47 4 p.m.(COLUMN)89(COLUMN)47 5 p.m.(COLUMN)88(COLUMN)48(END TABLE) Temperatures ending 8 a.m. (EDT) Yesterday(TABLE) City(COLUMN)H.(COLUMN)L. Albany(COLUMN)78(COLUMN)61 Albuquerque(COLUMN)98(COLUMN)58 Amarillo(COLUMN)100(COLUMN)69 Anchorage(COLUMN)62(COLUMN)50 Asheville(COLUMN)75(COLUMN)63 Atlanta(COLUMN)88(COLUMN)67 Atlantic City(COLUMN)68(COLUMN)65 Austin(COLUMN)92(COLUMN)74 Baltimore(COLUMN)86(COLUMN)65 Billings(COLUMN)74(COLUMN)48 Birmingham(COLUMN)95(COLUMN)73 Bismarck(COLUMN)71(COLUMN)50 Boise(COLUMN)85(COLUMN)57 Boston(COLUMN)77(COLUMN)66 Brownsville(COLUMN)91(COLUMN)78 Buffalo(COLUMN)77(COLUMN)68 Burlington, Vl.(COLUMN)77(COLUMN)62 Casper(COLUMN)74(COLUMN)53 Charleston, S.C.(COLUMN)86(COLUMN)76 Charleston, W.V.(COLUMN)88(COLUMN)67 Charlotte, N.C.(COLUMN)85(COLUMN)68 Cheyenne(COLUMN)70(COLUMN)53 Chicago(COLUMN)92(COLUMN)70 Cincinnati(COLUMN)87(COLUMN)68 Cleveland(COLUMN)89(COLUMN)67 Columbia, S.C.(COLUMN)88(COLUMN)70 Columbus, Ohio(COLUMN)87(COLUMN)68 Dal.-Ft. Worth(COLUMN)98(COLUMN)74 Dayton(COLUMN)91(COLUMN)69 Denver(COLUMN)82(COLUMN)59 Ees Moines(COLUMN)92(COLUMN)66 Detroit(COLUMN)92(COLUMN)67 Duluth(COLUMN)76(COLUMN)54 El Paso(COLUMN)107(COLUMN)64 Fairbanks(COLUMN)73(COLUMN)56 Fargo(COLUMN)74(COLUMN)53 Flagstaff(COLUMN)85(COLUMN)38 Great Falls(COLUMN)77(COLUMN)44 Hartford(COLUMN)80(COLUMN)63 Helena(COLUMN)73(COLUMN)44 Honolulu(COLUMN)86(COLUMN)77 Houston(COLUMN)93(COLUMN)78 Indianapolis(COLUMN)91(COLUMN)71 Jackson, Miss.(COLUMN)88(COLUMN)73 Jacksonville(COLUMN)88(COLUMN)70 Juneau(COLUMN)66(COLUMN)52 Kansas City(COLUMN)79(COLUMN)68 Las Vegas(COLUMN)97(COLUMN)70 Little Rock(COLUMN)84(COLUMN)69 Los Angeles(COLUMN)79(COLUMN)61 Louisville(COLUMN)86(COLUMN)72 Memphis(COLUMN)85(COLUMN)75 Miami Beach(COLUMN)87(COLUMN)80 Midland(COLUMN)106(COLUMN)72 Milwaukee(COLUMN)79(COLUMN)63 Mpls.-St. Paul(COLUMN)79(COLUMN)58 Nashville(COLUMN)81(COLUMN)68 New Orleans(COLUMN)92(COLUMN)72 New York(COLUMN)79(COLUMN)69 Norfolk(COLUMN)87(COLUMN)71 North Platte(COLUMN)74(COLUMN)58 Oklahoma City(COLUMN)95(COLUMN)74 Omaha(COLUMN)80(COLUMN)60 Orlando(COLUMN)95(COLUMN)73 Philadelphia(COLUMN)80(COLUMN)64 Phoenix(COLUMN)108(COLUMN)75 Pittsburgh(COLUMN)84(COLUMN)60 Portland, Mo.(COLUMN)65(COLUMN)53 Portland, Ore.(COLUMN)88(COLUMN)57 Providence(COLUMN)76(COLUMN)66 Raleigh(COLUMN)86(COLUMN)68 Rapid City(COLUMN)72(COLUMN)50 Reno(COLUMN)75(COLUMN)45 Richmond(COLUMN)86(COLUMN)68 St. Louis(COLUMN)87(COLUMN)73 St. Prbg.-Tampa(COLUMN)93(COLUMN)75 Salt Lake City(COLUMN)92(COLUMN)62 San Antonio(COLUMN)92(COLUMN)77 San Diego(COLUMN)71(COLUMN)61 San Francisco(COLUMN)59(COLUMN)52 San Juan, P.R.(COLUMN)89(COLUMN)78 St. Ste. Marie(COLUMN)65(COLUMN)46 Seattle(COLUMN)87(COLUMN)57 Shreveport(COLUMN)91(COLUMN)72 Sioux Falls(COLUMN)82(COLUMN)55 Spokane(COLUMN)84(COLUMN)56 Syracuse(COLUMN)80(COLUMN)62 Topeka(COLUMN)79(COLUMN)70 Tucson(COLUMN)102(COLUMN)73 Tulsa(COLUMN)95(COLUMN)77 Washington(COLUMN)87(COLUMN)68 Wichita(COLUMN)101(COLUMN)75(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)55 Ankara(COLUMN)pt. cldy.(COLUMN)3 p.m.(COLUMN)82 Athens(COLUMN)pt. cldy.(COLUMN)2 p.m.(COLUMN)82 Auckland(COLUMN)pt. cldy.(COLUMN)midnight(COLUMN)52 Berlin(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)72 Birmingham(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)50 Brussels(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)59 Cairo(COLUMN)clear(COLUMN)2 p.m.(COLUMN)88 Casablanca(COLUMN)pt. cldy.(COLUMN)noon(COLUMN)73 Copenhagen(COLUMN)pt. cldy.(COLUMN)1 p.m.(COLUMN)68 Dublin(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)54 Geneva(COLUMN)clear(COLUMN)1 p.m.(COLUMN)73 Hong Kong(COLUMN)pt. cldy.(COLUMN)8 p.m.(COLUMN)84 Lisbon(COLUMN)cloudy(COLUMN)noon(COLUMN)66 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)81 Mantla(COLUMN)cloudy(COLUMN)8 p.m.(COLUMN)84 Moscow(COLUMN)cloudy(COLUMN)3 p.m.(COLUMN)64 New Delhi(COLUMN)clear(COLUMN)5 p.m.(COLUMN)104 Nice(COLUMN)clear(COLUMN)1 p.m.(COLUMN)72 Oslo(COLUMN)pt. cldy.(COLUMN)1 p.m.(COLUMN)79 Paris(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)64 Peking(COLUMN)cloudy(COLUMN)8 p.m.(COLUMN)81 Rome(COLUMN)clear(COLUMN)1 p.m.(COLUMN)77 Saigon(COLUMN)cloudy(COLUMN)8 p.m.(COLUMN)79 Sofia(COLUMN)clear(COLUMN)2 p.m.(COLUMN)77 Stockholm(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)66 Sydney(COLUMN)clear(COLUMN)10 p.m.(COLUMN)55 Tel Aviv(COLUMN)pt. cldy.(COLUMN)2 p.m.(COLUMN)82 Tokyo(COLUMN)rain(COLUMN)9 p.m.(COLUMN)61 Tunis(COLUMN)clear(COLUMN)1 p.m.(COLUMN)70 Vienna(COLUMN)clear(COLUMN)1 p.m.(COLUMN)82 Warsaw(COLUMN)pt. cldy.(COLUMN)1 p.m.(COLUMN)73(END TABLE) Temperatures (Western Hemisphere)(TABLE) City(COLUMN)Weather(COLUMN)High(COLUMN)Low Acapulco(COLUMN)cloudy(COLUMN)95(COLUMN)79 Barbados(COLUMN)cloudy(COLUMN)86(COLUMN)79 Bermuda(COLUMN)clear(COLUMN)81(COLUMN)75 Calgary(COLUMN)clear(COLUMN)72(COLUMN)46 Edmonton(COLUMN)cloudy(COLUMN)72(COLUMN)43 Havana(COLUMN)cloudy(COLUMN)88(COLUMN)76 Kingston(COLUMN)cloudy(COLUMN)92(COLUMN)79 Montego Bay(COLUMN)cloudy(COLUMN)81(COLUMN)74 Mexico Bay(COLUMN)haze(COLUMN)79(COLUMN)56 Monterrey(COLUMN)cloudy(COLUMN)96(COLUMN)74 Montreal(COLUMN)cloudy(COLUMN)70(COLUMN)55 Nassau(COLUMN)clear(COLUMN)90(COLUMN)76 Ottawa(COLUMN)fog(COLUMN)79(COLUMN)57 Regina(COLUMN)clear(COLUMN)72(COLUMN)45 St. Kitts(COLUMN)cloudy(COLUMN)89(COLUMN)78 Toronto(COLUMN)storm(COLUMN)84(COLUMN)63 Vancouver(COLUMN)clear(COLUMN)77(COLUMN)57 Veracruz(COLUMN)cloudy(COLUMN)79(COLUMN)74 Winnipeg(COLUMN)cloudy(COLUMN)64(COLUMN)52(END TABLE)