Washington: Today - humid high near 90, low in 70s. Chance of rain 36 per cent today. 100 per cent tonight. Wednesday - Humid, highs in low to mid 90s.

Maryland: Today - Humid, highs in mid 80s to near 90s, lows in low to mid 70s. Chance of afternoon and evening showers. Wednesday - Humid, highs in mid 80s to near 90.

Virginia: Today - Humid, higs in upper 80s to mids 90s, low in low to mid 70s. Chance of afternoon evening showers. Wednesday - Humid, highs in upper 80s to mid 90s.

Lower Potomac and Chesapeakt Bay: Today - Far today, partly cloudy tonight with variable to poor visibility. Winds should be southernly today and southwesterly tonight at about 16 knots through Saturday - humid through period with chance of rain Friday and Saturday. Highs should average in mid 80s to mid 90s, lows in mid 60s to mid 70s.Washington's normal temperature range for this time of year is from 88 to 69.

Atlantic Ocean Beaches from Cape May to Cape Hatteras: Today - humid with chance of afternoon and evening showers, higs in 80s to near 90. Wednesday - humid, highs near 90s. Water temperatures should be in 70s both days.

The National Weather Forecast for Today - Showers and thunderstorms will be in store for the Ohio Valley and middle Atlantic states. Scattered thundershowers are also expected over the lower Mississippi Valley as well as the northern Rockies and southern plateau region. Skies will be cloudly over New England, the lower Great Lakes region adn the Pacific north west. Mostly sunny skies will be the rule for the remainer of the nation. Temperatures will continue to be warm to hot across the country with the exception of the Pacific northwest and northern Rockies where mild conditions will prevail.

ALMANAC DATA FOR July 11, 1977: Sun rises 5:52 a.m., sets 8:35 p.m.; moon rises 2:24 a.m. sets 4:39 P.m. Tides: High 5:13 a.m., and 5:36, low 12:07 p.m. and 12:15 a.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). Polien count: 43 gross (note: 7 or higher is considered undesirable.)

The Council of Government's Air Quality Index for yesterday showed the high reading in the Washington area during the 2 to 3 p.m. period was 40 for the pollutant, photochemical oxidants, index values between 25 and 49 indicate fair air cuslity. When the index exceeds 110 the air becomes harzardous and persons with lung, heart and eye problems should restrict their activity. The forecast for today indicates the air quality will improve.

The National Weather Service forecasts that the Potomac River stage at Little Falls will remain near 2.7 feet today. Local Temp., Humidity(TABLE) Time(COLUMN)T(COLUMN)H. 12 mid(COLUMN)79(COLUMN)82 1 a.m.(COLUMN)78(COLUMN)84 2 a.m.(COLUMN)77(COLUMN)85 3 a.m.(COLUMN)76(COLUMN)88 4 a.m.(COLUMN)75(COLUMN)91 5 a.m.(COLUMN)75(COLUMN)91 6 a.m.(COLUMN)75(COLUMN)91 7 a.m.(COLUMN)76(COLUMN)88 8 a.m.(COLUMN)75(COLUMN)93 9 a.m.(COLUMN)76(COLUMN)91 10 a.m.(COLUMN)77(COLUMN)88 11 a.m.(COLUMN)79(COLUMN)82 noon(COLUMN)81(COLUMN)77 1 p.m.(COLUMN)85(COLUMN)68 3 p.m.(COLUMN)77(COLUMN)88 4 p.m.(COLUMN)81(COLUMN)77 5 p.m.(COLUMN)82(COLUMN)74 6 p.m.(COLUMN)81(COLUMN)74(END TABLE) Temperatures ending 8 a.m. (EDT) yesterday(TABLE) City(COLUMN)High(COLUMN)Low Albany(COLUMN)79(COLUMN)50 Alburderque(COLUMN)95(COLUMN)69 Amaritta(COLUMN)96(COLUMN)73 Anchorage(COLUMN)77(COLUMN)58 Asheville(COLUMN)93(COLUMN)65 Atlanta(COLUMN)92(COLUMN)68 Atlantic City(COLUMN)78(COLUMN)70 Austin(COLUMN)94(COLUMN)71 Baltimore(COLUMN)88(COLUMN)71 Billings(COLUMN)74(COLUMN)50 Birmingham(COLUMN)92(COLUMN)72 Bismack(COLUMN)85(COLUMN)52 Boise(COLUMN)83(COLUMN)52 Boston(COLUMN)74(COLUMN)61 Brownsville(COLUMN)94(COLUMN)78 Buffalo(COLUMN)76(COLUMN)59 Burlington, Vt(COLUMN)74(COLUMN)48 Casper(COLUMN)87(COLUMN)40 Charleston, S.C,(COLUMN)99(COLUMN)80 Chistan, W.Va,(COLUMN)81(COLUMN)66 Charlotte, N.C.(COLUMN)97(COLUMN)71 Cheverne(COLUMN)86(COLUMN)45 Chicago(COLUMN)86(COLUMN)69 Cincinnati(COLUMN)76(COLUMN)68 Cleveland(COLUMN)77(COLUMN)60 Columbia, S.C(COLUMN)101(COLUMN)68 Columbia, Ohio(COLUMN)81(COLUMN)67 Dal. Ft. Worth(COLUMN)100(COLUMN)75 Davton(COLUMN)79(COLUMN)63 Denver(COLUMN)95(COLUMN)51 Des Maines(COLUMN)90(COLUMN)67 Detroit(COLUMN)51(COLUMN)60 Duluth(COLUMN)67(COLUMN)52 El Paso(COLUMN)101(COLUMN)68 Fairbanks(COLUMN)80(COLUMN)61 Fargo(COLUMN)83(COLUMN)62 Flagstaff(COLUMN)85(COLUMN)52 Great Falls(COLUMN)69(COLUMN)45 Hartford(COLUMN)83(COLUMN)55 Helena(COLUMN)75(COLUMN)43 Honolulu(COLUMN)83(COLUMN)77 Houston(COLUMN)92(COLUMN)79 Indianapolis(COLUMN)79(COLUMN)72 Jackson, Miss.(COLUMN)86(COLUMN)73 Jacksonville(COLUMN)96(COLUMN)70 Juneau(COLUMN)63(COLUMN)43 Kansas City(COLUMN)87(COLUMN)64 Las Vegas(COLUMN)103(COLUMN)73 Little Rock(COLUMN)89(COLUMN)72 Los Angeles(COLUMN)51(COLUMN)62 Louisville(COLUMN)83(COLUMN)69 Memphis(COLUMN)90(COLUMN)77 Miami Beach(COLUMN)83(COLUMN)82 Midland(COLUMN)90(COLUMN)70 Milwaukee(COLUMN)71(COLUMN)61 Mpls-St Paul(COLUMN)76(COLUMN)65 Nashville(COLUMN)90(COLUMN)73 New Orleans(COLUMN)90(COLUMN)75 New York(COLUMN)85(COLUMN)66 Norfolk(COLUMN)88(COLUMN)77 North Platte(COLUMN)80(COLUMN)60 Oklahoma City(COLUMN)94(COLUMN)77 Omaha(COLUMN)88(COLUMN)62 Orlando(COLUMN)91(COLUMN)71 Philadelphia(COLUMN)36(COLUMN)66 Phoenix(COLUMN)107(COLUMN)86 Pittsburgh(COLUMN)78(COLUMN)66 Portland, Me(COLUMN)78(COLUMN)49 Portland, Ore(COLUMN)73(COLUMN)56 Providence(COLUMN)80(COLUMN)56 Raleigh(COLUMN)95(COLUMN)70 Rapid City(COLUMN)90(COLUMN)51 Reno(COLUMN)88(COLUMN)49 Richmond(COLUMN)90(COLUMN)71 St Louis(COLUMN)89(COLUMN)69 St. Prbg-Tampa(COLUMN)92(COLUMN)74 Salt Lake City(COLUMN)85(COLUMN)73 San Antonio(COLUMN)92(COLUMN)77 San Diego(COLUMN)75(COLUMN)65 San Francisco(COLUMN)65(COLUMN)52 San Juan, P.R,(COLUMN)88(COLUMN)75 St. Ste, Marie(COLUMN)71(COLUMN)52 Seattle(COLUMN)71(COLUMN)58 Shreveport(COLUMN)92(COLUMN)71 Sioux Falls(COLUMN)85(COLUMN)63 Spokane(COLUMN)77(COLUMN)54 Syracuse(COLUMN)77(COLUMN)52 Topeka(COLUMN)89(COLUMN)66 Tucson(COLUMN)102(COLUMN)76 Tulsa(COLUMN)93(COLUMN)78 Washington(COLUMN)91(COLUMN)74 Witchita(COLUMN)91(COLUMN)78(END TABLE) TEMPERATURES ABROAD YESTERDAY(TABLE) City(COLUMN)Weather(COLUMN)Time(COLUMN)Temp. Aberdeen(COLUMN)clear(COLUMN)1 p.m.(COLUMN)64 Amsterdam(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)64 Arkara(COLUMN)pt cldy(COLUMN)3 p.m.(COLUMN)79 Athens(COLUMN)clear(COLUMN)2 p.m.(COLUMN)97 Auckland(COLUMN)clear(COLUMN)midnight(COLUMN)46 Berlin(COLUMN)pt cldy(COLUMN)1 p.m.(COLUMN)81 Birmingham(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)57 Brussels(COLUMN)clear(COLUMN)1 p.m.(COLUMN)72 Cairo(COLUMN)clear(COLUMN)2 p.m.(COLUMN)102 Casapianca(COLUMN)clear(COLUMN)noon(COLUMN)72 Copenhagen(COLUMN)clear(COLUMN)1 p.m.(COLUMN)72 Dublin(COLUMN)clear(COLUMN)1 p.m.(COLUMN)66 Geneva(COLUMN)clear(COLUMN)1 p.m.(COLUMN)70 Hong kong(COLUMN)cldy(COLUMN)8 p.m.(COLUMN)86 Lisbor(COLUMN)clear(COLUMN)noon(COLUMN)75 London(COLUMN)clear(COLUMN)1 p.m.(COLUMN)64 Madrid(COLUMN)clear(COLUMN)1 p.m.(COLUMN)81 Malta(COLUMN)clear(COLUMN)1 p.m.(COLUMN)90 Manila(COLUMN)cldy(COLUMN)8 p.m.(COLUMN)84 Moscow(COLUMN)pt cldy(COLUMN)3 p.m.(COLUMN)75 New Delhi(COLUMN)cloudy(COLUMN)5 p.m.(COLUMN)88 Nice(COLUMN)pt cldy(COLUMN)1 p.m.(COLUMN)75 osio(COLUMN)clear(COLUMN)1 p.m.(COLUMN)79 Paris(COLUMN)clear(COLUMN)1 p.m.(COLUMN)79 Paris(COLUMN)clear(COLUMN)1 p.m.(COLUMN)81 Peking(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)81 Rome(COLUMN)clear(COLUMN)1 p.m.(COLUMN)82 Saigon(COLUMN)clpudy(COLUMN)8 p.m.(COLUMN)63 Sofia(COLUMN)rain(COLUMN)2 p.m.(COLUMN)68 Stockholm pt cloudy(COLUMN)1 p.m.(COLUMN)72 Sydney(COLUMN)pt cldy(COLUMN)10 p.m.(COLUMN)57 Tel Aviv(COLUMN)clear(COLUMN)2 p.m.(COLUMN)93 Tokyo(COLUMN)rain(COLUMN)9 p.m.(COLUMN)72 Tunis(COLUMN)clear(COLUMN)1 p.m.(COLUMN)84 Vienna(COLUMN)pt cldy(COLUMN)1 p.m.(COLUMN)70 Warsaw(COLUMN)pt cldy(COLUMN)1 p.m.(COLUMN)70(END TABLE) TEmperatures (Western Hemisphere)(TABLE) City(COLUMN)Weather(COLUMN)H(COLUMN)L Acpuko(COLUMN)Pt cloudy(COLUMN)91(COLUMN)78 Barosdos(COLUMN)cloudy(COLUMN)86(COLUMN)77 Bermuda(COLUMN)pt cloudy(COLUMN)86(COLUMN)77 Calgary(COLUMN)clear(COLUMN)64(COLUMN)41 Culiancan(COLUMN)pt cloudy(COLUMN)93 77 Edmanton(COLUMN)clear(COLUMN)64(COLUMN)41 Havana(COLUMN)pt cldy(COLUMN)90(COLUMN)77 Kingstan(COLUMN)pt cldy(COLUMN)91(COLUMN)78 Monteco Bay(COLUMN)pt cldy(COLUMN)88(COLUMN)75 Mexico City(COLUMN)pt cldy(COLUMN)75(COLUMN)51 Monterrey(COLUMN)sunny(COLUMN)96(COLUMN)72 Montreal(COLUMN)cloudy(COLUMN)73(COLUMN)52 Nassau(COLUMN)pt cldy(COLUMN)88(COLUMN)72 Ottawa(COLUMN)pt cldy(COLUMN)75(COLUMN)52 Regina(COLUMN)drizzle(COLUMN)77(COLUMN)57 St Knitts(COLUMN)pt cldy(COLUMN)89(COLUMN)76 Toronto(COLUMN)cloudy(COLUMN)72(COLUMN)52 Vancouver(COLUMN)drizzle(COLUMN)68(COLUMN)73 Winnipeg(COLUMN)rain(COLUMN)79(COLUMN)64(END TABLE)