Washington: Today - Cloudy today, rain tonight, high near 60, low near 40. Chance of rain 20 per cent today, 80 per cent tonight. Sunday - Rain, high in 50s.

Maryland and Virginia: Today - Cloudy, high in 50s to low 60s, low in 30s to low 40s. Rain is likely this afternoon in west and through area tonight. Sunday - Rain high in mid 40s and 50s.

Lower Potomac and Chesapeake Bay: Today - Cloudy today with visibility 5 miles or greater, rain tonight with visibility 2 miles or less. Winds should be variable to 10 knots or less today becoming southerly at 10 to 15 knots tonight.

Extended Area Outlook: For Monday through Wednesday - Chance of precipitation Monday with highs near 60, lows near 40 followed by partly cloudy skies with highs near 50, lows near 30 Tuesday and Wednesay. Washington's normal temperature range for this time of year is from 50 to 31.

West Virginia: Today - Rain, high in low 60s, low in 40s. Sunday - Rain, high in upper 40s to mid 50s.

The National Weather Forecast for Today - Except for snow in the northern Appalachians and northern Michigan, showers and thunderstorms will be scattered from the Appalachians through the Ohio Valley, southern Missouri and Oklahoma southward over the western and central Gulf Coast. There will be increasing cloudiness over much of the Atlantic Coast region. Rain, with snow at higher elevations will extend from the northern half of the Pacific Coast into the northern and Central Rockies. Elsewhere it will be partly sunny to sunny. It will be much colder in the southern Plains and coller over the southern half of the Mississippi Valley into Alabama.

Almanac data for Feb. 27, 1977: Sun rises 6:44 a.m., sets 6:00 p.m.; moon rises 12:21 p.m. sets 2:08 a.m.

Tides: High 1:26 a.m. and 1:53 p.m., low 8:27 a.m. and 9:09 p.m. High and low tides at the following points can be obtained by subtracting the hours indicated from the tides above: Annapolis (3 1/4); Bloody Point Lighthouse (4 1/2); Deale, Md. (4 1/2); Colonial Beach (6); Norfolk (1 1/2); Virginia Beach (1); Solomon's 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 to 3 p.m. period was 25 for the pollutant, photochemical oxidants. Index values between 25 and 49 indicate fair air quality. When the index exceeds 100 the air becomes hazardous and persons with hung, 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 3.7 feet today.

Washington data at 7 p.m. (EST) yesterday: Highest temperature since 7 a.m. yesterday 72 degrees at 2:45 p.m. Lowest temperature since midnight, 42 degrees at 5:15 a.m. Excess of temperature since Feb. 1, 10 degrees. Deficiency of temperature since Jan. 1, 294 degrees. Record high temperature for today, 74 degrees in 1932. Record low temperature for today, 12 degrees in [WORD ILLEGIBLE] Relative humidity: Maximum, 85 per cent at 2 a.m.; Miximum, 14 per cent at 4 a.m. 24 hour precipitation, .82 inches. Deficency of precipitation since Feb. 1, 1.53 inches. Deficiency of precipitation since Jan. 1, 2.65 inches. Highest observed wind since 7 a.m. 26 miles per hour from the west at 2:53 p.m. Peak gust since 7 a.m, 46 miles per hour from the west at 3:57 p.m. Local Temp., Humidity(TABLE) Time(COLUMN)T.(COLUMN)H. 12 mid.(COLUMN)50(COLUMN)66 1 a.m.(COLUMN)47(COLUMN)71 2 a.m.(COLUMN)44(COLUMN)86 3 a.m.(COLUMN)45(COLUMN)83 4 a.m.(COLUMN)46(COLUMN)74 5 a.m.(COLUMN)44(COLUMN)76 6 a.m.(COLUMN)44(COLUMN)76 7 a.m.(COLUMN)46(COLUMN)71 8 a.m.(COLUMN)47(COLUMN)66 9 a.m.(COLUMN)55(COLUMN)49 10 a.M.(COLUMN)58(COLUMN)44 11 a.m.(COLUMN)63(COLUMN)34 12 noon(COLUMN)64(COLUMN)30 1 p.m.(COLUMN)66(COLUMN)25 2 p.m.(COLUMN)69(COLUMN)19 3 p.m.(COLUMN)72(COLUMN)15 4 p.m.(COLUMN)72(COLUMN)14 5 p.m.(COLUMN)70(COLUMN)16 6 p.m.(COLUMN)67(COLUMN)17(END TABLE) Temperatures ending 7 a.m. (EST) yesterday:(TABLE) City(COLUMN)H.(COLUMN)L. Aonamy(COLUMN)38(COLUMN)22 Albuquerque(COLUMN)61(COLUMN)32 Amarillo(COLUMN)69(COLUMN)43 Anchorage(COLUMN)34(COLUMN)29 Ashevilie(COLUMN)61(COLUMN)40 Atlantic City(COLUMN)53(COLUMN)44 Austin(COLUMN)86(COLUMN)51 Baltimore(COLUMN)56(COLUMN)41 Billings(COLUMN)37(COLUMN)23 Birmingham(COLUMN)66(COLUMN)44 Bismarck(COLUMN)31(COLUMN)27 Boise(COLUMN)39(COLUMN)20 Boston(COLUMN)39(COLUMN)35 Brownsville(COLUMN)86(COLUMN)64 Buffalo(COLUMN)51(COLUMN)34 Burlington, Vt.(COLUMN)37(COLUMN)31 Casper(COLUMN)32(COLUMN)09 Charieston, S.C.(COLUMN)71(COLUMN)51 Charieston, Wva.(COLUMN)61(COLUMN)45 Chariotte, N.C.(COLUMN)65(COLUMN)48 Cheyersne(COLUMN)37(COLUMN)17 Chicago(COLUMN)53(COLUMN)33 Cincinnatl(COLUMN)52(COLUMN)38 Cleveiend(COLUMN)55(COLUMN)34 Columbia, S.C.(COLUMN)71(COLUMN)55 Columtous. Onie(COLUMN)55(COLUMN)38 Dal.-Ft. Worth(COLUMN)78(COLUMN)54 Dayton(COLUMN)52(COLUMN)38 Denver(COLUMN)47(COLUMN)24 Des Moines(COLUMN)39(COLUMN)32 Detriut(COLUMN)52(COLUMN)34 Duluth(COLUMN)30(COLUMN)14 El Paso(COLUMN)75(COLUMN)49 Fairbanks(COLUMN)25(COLUMN)04 Fargo(COLUMN)23(COLUMN)20 Flagstaff(COLUMN)35(COLUMN)11 Great Falls(COLUMN)33(COLUMN)21 Harifors(COLUMN)37(COLUMN)36 Helens(COLUMN)36(COLUMN)15 Honoluis(COLUMN)83(COLUMN)72 Houston(COLUMN)84(COLUMN)56 Indianapolis(COLUMN)52(COLUMN)38 Jackson. Miss.(COLUMN)74(COLUMN)52 Jacksomrillie(COLUMN)71(COLUMN)46 Juneau(COLUMN)40(COLUMN)34 Kansas City(COLUMN)57(COLUMN)37 Las Veges(COLUMN)56(COLUMN)42 Little Rock(COLUMN)70(COLUMN)49 Los Angeies(COLUMN)58(COLUMN)43 Louisville(COLUMN)59(COLUMN)50 Memphis(COLUMN)68(COLUMN)48 Mjami Beach(COLUMN)84(COLUMN)60 Midland(COLUMN)79(COLUMN)46 Milwaukee(COLUMN)44(COLUMN)28 Mpis.-St. Paul(COLUMN)37(COLUMN)22 Nashvile(COLUMN)64(COLUMN)48 New Crieans(COLUMN)78(COLUMN)46 New York(COLUMN)52(COLUMN)40 Norfolk(COLUMN)67(COLUMN)45 North Platte(COLUMN)48(COLUMN)25 Oklahoma City(COLUMN)68(COLUMN)50 Omaha(COLUMN)49(COLUMN)33 Oriando(COLUMN)76(COLUMN)39 Philadeiphia(COLUMN)38(COLUMN)42 Phoenix(COLUMN)72(COLUMN)45 Pittsburgh(COLUMN)53(COLUMN)37 Portland, Me.(COLUMN)31(COLUMN)24 Portland, ORe.(COLUMN)45(COLUMN)36 Providence(COLUMN)36(COLUMN)38 Raleigh(COLUMN)62(COLUMN)62 Rapid City(COLUMN)42(COLUMN)28 Reno(COLUMN)43(COLUMN)24 Richmond(COLUMN)69(COLUMN)43 St. Louis(COLUMN)57(COLUMN)40 St. Pros-Tampa(COLUMN)76(COLUMN)44 San Diego(COLUMN)60(COLUMN)47 San Francisco(COLUMN)59(COLUMN)48 San Juan, P.R.(COLUMN)84(COLUMN)72 St. Ste. Marie(COLUMN)36(COLUMN)29 Seattle(COLUMN)53(COLUMN)39 Shreveport(COLUMN)79(COLUMN)51 Sioux Falls(COLUMN)30(COLUMN)28 Spokane(COLUMN)43(COLUMN)28 Syracuse(COLUMN)42(COLUMN)37 Tucson(COLUMN)75(COLUMN)45 Tulsa(COLUMN)69(COLUMN)45 Washington(COLUMN)62(COLUMN)42 Wichita(COLUMN)65(COLUMN)43(END TABLE) Temperatures Abroad Yesterday(TABLE) City(COLUMN)Weather(COLUMN)Time(COLUMN)Temp. Aberdeen(COLUMN)pt. cldy(COLUMN) 1 p.m.(COLUMN)39 Amsterdam(COLUMN)rain(COLUMN) 1 p.m.(COLUMN)43 Ankara(COLUMN)clear(COLUMN) 3 p.m.(COLUMN)63 Athens(COLUMN)pt. cldy(COLUMN) 2 p.m.(COLUMN)63 Auckiand(COLUMN)pt. cldy(COLUMN)midnight(COLUMN)64 Berlin(COLUMN)cloudy(COLUMN) 1 p.m.(COLUMN)50 Bimingham(COLUMN)rain(COLUMN) 1 p.m.(COLUMN)37 Brusests(COLUMN)cloudy(COLUMN) 1 p.m.(COLUMN)45 Cairo(COLUMN)clear(COLUMN) 2 p.m.(COLUMN)81 Casabianca(COLUMN)clear(COLUMN)noon(COLUMN)63 Coperhagon(COLUMN)cloudy(COLUMN) 1 p.m.(COLUMN)34 Dublin(COLUMN)cloudy(COLUMN) 1 p.m.(COLUMN)41 Generva(COLUMN)pt. cldy(COLUMN) 1 p.m.(COLUMN)48 Hong Kong(COLUMN)clear(COLUMN) 8 p.m.(COLUMN)66 Liston(COLUMN)pt. cldy(COLUMN)noon(COLUMN)57 London(COLUMN)cloudy(COLUMN) 1 p.m.(COLUMN)45 Madrid(COLUMN)drizzle(COLUMN) 1 p.m.(COLUMN)45 Maltha(COLUMN)clear(COLUMN) 1 p.m.(COLUMN)64 Manila(COLUMN)pt. cldy(COLUMN) 8 p.m.(COLUMN)81 Moscow(COLUMN)snow(COLUMN) 3 p.m.(COLUMN)32 New Dethi(COLUMN)clear(COLUMN) 5 p.m.(COLUMN)73 Nice(COLUMN)clear(COLUMN) 1 p.m.(COLUMN)61 Oslo(COLUMN)clear(COLUMN) 1 p.m.(COLUMN)27 Paris(COLUMN)cloudy(COLUMN) 1 p.m.(COLUMN)46 Peking(COLUMN)clear(COLUMN) 8 p.m.(COLUMN)46 Rome(COLUMN)clear(COLUMN) 1 p.m.(COLUMN)59 Salgon(COLUMN)pt. cldy(COLUMN) 8 p.m.(COLUMN)82 Sofla(COLUMN)pt. cldy(COLUMN) 2 p.m.(COLUMN)66 Stockhoim(COLUMN)clear(COLUMN) 1 p.m.(COLUMN)19 Sydney(COLUMN)cloudy(COLUMN)10 p.m.(COLUMN)73 Tei Aviv(COLUMN)clear(COLUMN) 2 p.m.(COLUMN)72 Tokyo(COLUMN)rain(COLUMN) 9 p.m.(COLUMN)59 Tunis(COLUMN)clear(COLUMN) 1 p.m.(COLUMN)63 Vienna(COLUMN)cloudy(COLUMN) 1 p.m.(COLUMN)48 Warsaw(COLUMN)cloudy(COLUMN) 1 p.m.(COLUMN)39(END TABLE) Tempertures (Western Hemisphere)(TABLE) City(COLUMN)Weather(COLUMN)High(COLUMN)Low Acacuico(COLUMN)cloudy(COLUMN)86(COLUMN)72 Barbados(COLUMN)pt. cldy.(COLUMN)82(COLUMN)73 Bermoda(COLUMN)cloudy(COLUMN)68(COLUMN)61 Bogota(COLUMN)pt. cldy.(COLUMN)68(COLUMN)50 Calgary(COLUMN)clear(COLUMN)37(COLUMN)21 Culiacan(COLUMN)cloudy(COLUMN)92(COLUMN)57 Edmorton(COLUMN)cloudy(COLUMN)36(COLUMN)16 Havana(COLUMN)cloudy(COLUMN)87(COLUMN)68 Monteso Bay(COLUMN)clear(COLUMN)86(COLUMN)68 Mexico City(COLUMN)77(COLUMN)49 Monterrey(COLUMN)clear(COLUMN)86(COLUMN)54 Montreal(COLUMN)snow(COLUMN)36(COLUMN)25 Ottawa(COLUMN)ckloudy(COLUMN)32(COLUMN)27 Ragina(COLUMN)cloudy(COLUMN)32(COLUMN)23 St. Kitts(COLUMN)cloudy(COLUMN)82(COLUMN)72 St. Thomas(COLUMN)clear(COLUMN)78(COLUMN)75 Tornonto(COLUMN)cloudy(COLUMN)41(COLUMN)32 Vancouver(COLUMN)cloudy(COLUMN)46(COLUMN)36 Veracruz(COLUMN)haze(COLUMN)80(COLUMN)64 Winnipes(COLUMN)snow(COLUMN)25(COLUMN)18(END TABLE)