Washington: Today -- partly cloudy, high in mid to upper 20s, low 10 to 15. Chance of precipitation 10 per cent today, 20 per cent tonight. Sunday -- Chance of snow, high in 30s.

Maryland and Virginia: Today --cloudy, high near 30, law in teens. Chance of snow. Sunday -- Chance of sleet or snow, highs in 30s.

Lower Potomac and Chesapeake Bay: Today -- Fair today, partly cloudy tonight with visibility of 5 miles or more through tonigh. Winds should be out of west to northwest at 10 to 20 knots this morning becoming variable at 6 to 12 knots later in day, shifting to east to northeast at 8 to 12 knots tonight.

Extended Area Outlook: For Monday through Wednesday -- Snow likely through first half of period followed by clearing skies. highs should average near 30s, lows in teens or lower. Washington's normal temperature range for this time of year is from 43 to 28.

West Virginia: Today -- Partly cloudy, highs in 20s to low 30s, lows in teens. Snow is likely tonight throughout the state. Sunday -- Snow, high in mid 20s to mid 30s.

The National Weather Forecast for Today -- Snow will fall from the Great Lakes region across the Ohio Valley, the middle Mississippi Valley, South Minnesota, the central Plains, the central Rockies and the central plateau. elsewhere, clear or partly cloudy skies are expected. It will be much colder through the north and central Rockies, the northern plateau and the north and central Plains, as well as across the lower Great Lakes region and Florida. Warmer temperatures will be experienced from the lower Mississippi Valley along the Texas Gulf Coast and into the lower Ohio Valley. Little temperature change is expected elsewhere.

ALMANAC DATA for Jan. 8, 1977. Sun rises 7:27 a.m., sets 5:00 p.m.; moon rises 8:39 p.m., sets 9:07 a.m. Tides: High 9:47 a.m. and 10:05 p.m., low 4:23 a.m. and 4:29 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' AlQuality Index for yesterday showed the high reading in the Washington area during the 2 to 3 p.m. resied was 16 for the pollutant, photochemical evidents index values between 3 and[WORD ILLEGIBLE] quality. When the index exceeds 100 the air becomes hazardous and persons with lung, heart and eye problems should restrict their activity. The forecast for today Indicates the air quality will remain about the same.

The National Weather Service forecasts that the Potomac River stage at Little Falls will remain near 3.4 feet today.

Washington data at 7 p.m. (EST) yesterday: Highest temperature since 7 a.m. yesterday, 39 degrees at 11:45 a.m. Lowest temperature since midnight, 27 degrees at 6:25 p.m. Record high temperature for today, 69 degrees in 1937. Record low temperature for today, O degrees in 1878. Deficiency of temperature since Jan. 1, 47 degrees. Relative humidity: Maximum, 96 per cent at 6 p.m. 24 hour precipitation, .36 inches. Deficiency of precipitation since Jan. 1, .09 inches. Highest observed wind since 7 a.m., 28 miles per hour from the N.W. at 4 p.m. Peak gust since 7 a.m., 46 miles per hour from the N.W., at 2:29 p.m.

Local Temp., Humidity (TABLE) Time(COLUMN)T.(COLUMN)H. 12 mdngt(COLUMN)31(COLUMN)85 1 a.m.(COLUMN)30(COLUMN)92 2 a.m.(COLUMN)31(COLUMN)92 3. a.m.(COLUMN)31(COLUMN)92 4 a.m.(COLUMN)31(COLUMN)92 5 a.m.(COLUMN)32(COLUMN)96 6 a.m.(COLUMN)32(COLUMN)96 7 a.m.(COLUMN)32(COLUMN)96 8 a.m.(COLUMN)32(COLUMN)96 9 a.m.(COLUMN)32(COLUMN)89 10 a.m.(COLUMN)34(COLUMN)79 11 a.m.(COLUMN)36(COLUMN)73 12 noon(COLUMN)39(COLUMN)62 1 p.m.(COLUMN)39(COLUMN)57 2 p.m.(COLUMN)37(COLUMN)59 3 p.m.(COLUMN)36(COLUMN)48 4 p.m.(COLUMN)33(COLUMN)49 5 p.m.(COLUMN)30(COLUMN)47 6 p.m.(COLUMN)28(COLUMN)46(END TABLE)

Temperatures ending 7 a.m. (EST) yesterday: (TABLE) City(COLUMN)H.(COLUMN). Albany(COLUMN)35(COLUMN)24 Albuquerque(COLUMN)32(COLUMN)19 Amarillo(COLUMN)36(COLUMN)17 Anchorage(COLUMN)35(COLUMN)29 Asheville(COLUMN)44(COLUMN)34 Atlanta(COLUMN)39(COLUMN)35 Atlantic City(COLUMN)35(COLUMN)29 Austin(COLUMN)51(COLUMN)34 Baltimore(COLUMN)34(COLUMN)28 Billings(COLUMN)25(COLUMN)19 Birmingham(COLUMN)41(COLUMN)37 Bismarck(COLUMN)09(COLUMN)02 Boise(COLUMN)18(COLUMN)-5 Boston(COLUMN)33(COLUMN)31 Brownsville(COLUMN)71(COLUMN)41 Buffalo(COLUMN)29(COLUMN)23 Burlington, Vt.(COLUMN)25(COLUMN)19 Casper(COLUMN)24(COLUMN)20 Charleston, S.C.(COLUMN)50(COLUMN)43 Ch'lestn, W. Va.(COLUMN)32(COLUMN)28 Charlotte, N.C.(COLUMN)39(COLUMN)38 Cheyenne(COLUMN)36(COLUMN)25 Chicago(COLUMN)24(COLUMN)03 Cincinnati(COLUMN)28(COLUMN)20 Cleveland(COLUMN)26(COLUMN)20 Columbia, S.C.(COLUMN)46(COLUMN)43 Columbus, Ohio(COLUMN)26(COLUMN)20 Dal.-Ft. Worth(COLUMN)41(COLUMN)31 Dayton(COLUMN)28(COLUMN)17 Denver(COLUMN)46(COLUMN)21 Des Moines(COLUMN)23(COLUMN)2 Detroit(COLUMN)25(COLUMN)15 Duluth(COLUMN)06(COLUMN)13 El Paso(COLUMN)54(COLUMN)29 Fairbanks(COLUMN)18(COLUMN)05 Fargo(COLUMN)07(COLUMN)-14 Flagstaff(COLUMN)28(COLUMN)-3 Great Falls(COLUMN)32(COLUMN)27 Hartford(COLUMN)28(COLUMN)26 Helena(COLUMN)19(COLUMN)04 Honolulu(COLUMN)82(COLUMN)70 Houston(COLUMN)53(COLUMN)40 Indianapolis(COLUMN)26(COLUMN)06 Jackson, Miss(COLUMN)41(COLUMN)37 Jacksonville(COLUMN)67(COLUMN)54 Juneau(COLUMN)40(COLUMN)33 Kansas City(COLUMN)22(COLUMN)10 Las Vegas(COLUMN)50(COLUMN)32 Little Rock(COLUMN)34(COLUMN)24 Los Angeles(COLUMN)52(COLUMN)49 Louisville(COLUMN)32(COLUMN)22 Memphis(COLUMN)37(COLUMN)31 Miami Beach(COLUMN)74(COLUMN)65 Midland(COLUMN)59(COLUMN)28 Milwaukee(COLUMN)20(COLUMN)00 Mpls.-St. Paul(COLUMN)12(COLUMN)-12 Nashville(COLUMN)35(COLUMN)31 New Orleans(COLUMN)73(COLUMN)44 New York(COLUMN)31(COLUMN)28 Northfolk(COLUMN)37(COLUMN)31 LNorth Platte 30(COLUMN)10 Oklahoma City(COLUMN)40(COLUMN)19 Omaha(COLUMN)27(COLUMN)-1 Orlando(COLUMN)70(COLUMN)60 Philadelphia(COLUMN)34(COLUMN)27 Phoenix(COLUMN)62(COLUMN)41 Pittsburgh(COLUMN)29(COLUMN)24 Portland, Me.(COLUMN)19(COLUMN)09 Portland, Ore.(COLUMN)37(COLUMN)21 Providence(COLUMN)33(COLUMN)30 Raleigh(COLUMN)36(COLUMN)29 Rapid City(COLUMN)30(COLUMN)20 Reno(COLUMN)36(COLUMN)13 Richmond(COLUMN)32(COLUMN)29 St. Louis(COLUMN)26(COLUMN)10 St. Pbg.-Tamoa(COLUMN)71(COLUMN)63 Salt Lake City(COLUMN)30(COLUMN)08 San Antonio(COLUMN)59(COLUMN)40 San Diego(COLUMN)62(COLUMN)54 San Francisco(COLUMN)58(COLUMN)46 San Juan, P.R.(COLUMN)86(COLUMN)71 St. Ste. Marie(COLUMN)21(COLUMN)04 Seattle(COLUMN)43(COLUMN)27 Shreveport(COLUMN)43(COLUMN)26 Sioux Falls(COLUMN)19(COLUMN)-10 Spokane(COLUMN)21(COLUMN)06 Syracuse(COLUMN)30(COLUMN)27 Tucson(COLUMN)59(COLUMN)37 Tulsa(COLUMN)31(COLUMN)16 Washington(COLUMN)33(COLUMN)20 Wichita(COLUMN)27(COLUMN)08(END TABLE)

Temperatures Abroad Yesterday (TABLE) City(COLUMN)Weather(COLUMN)*2*Time Temp. Aberdeen(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)43 Amsterdam(COLUMN)pt. cldy.(COLUMN)1 p.m.(COLUMN)43 Ankara(COLUMN)pt. cldy.(COLUMN)3 p.m.(COLUMN)27 Athens(COLUMN)clear(COLUMN)2 p.m.(COLUMN)52 Auckland(COLUMN)*2*cloudy midnight(COLUMN)63 Berlin(COLUMN)rain(COLUMN)1 p.m.(COLUMN)36 Birmingham(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)43 Brussels(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)36 Cairo(COLUMN)pt. cldy.(COLUMN)2 p.m.(COLUMN)59 Casablanca(COLUMN)pt. cldy(COLUMN)noon(COLUMN)57 Dublin(COLUMN)pt. cldy.(COLUMN)1 p.m.(COLUMN)43 Geneva(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)32 Hong Kong(COLUMN)pt. cldy(COLUMN)8 p.m.(COLUMN)57 Lisbon(COLUMN)Clear(COLUMN)noon(COLUMN)43 London(COLUMN)clear(COLUMN) 1 p.m.(COLUMN)41 Madrid(COLUMN)pt. cldy(COLUMN)1 p.m.(COLUMN)50 Malta(COLUMN)Cloudy(COLUMN)1 p.m.(COLUMN)59 Manila(COLUMN)cloudy(COLUMN)8 p.m.(COLUMN)79 Moscow(COLUMN)cloudy(COLUMN)3 p.m.(COLUMN)14 New Delhi(COLUMN)clear(COLUMN)5 p.m.(COLUMN)73 Nice(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)55 Osio(COLUMN)clear(COLUMN)1 p.m.(COLUMN)34 Paris(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)37 Peking(COLUMN)clear(COLUMN)8 p.m.(COLUMN)19 Rome(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)55 Saigon(COLUMN)clear(COLUMN)8 p.m.(COLUMN)79 Sofia(COLUMN)pt. cldy(COLUMN)2 p.m.(COLUMN)30 Stockholm(COLUMN)clear(COLUMN)1 p.m.(COLUMN)30 Sydney(COLUMN)clear(COLUMN)10 p.m.(COLUMN)70 Tel Aviv(COLUMN)cloudy(COLUMN)2 p.m.(COLUMN)48 Tokyo(COLUMN)cloudy(COLUMN)9 p.m.(COLUMN)41 Tunis(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)55 Vienna(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)34 Warsaw(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)32(END TABLE)

Temperatures (Western Hemisphere) (TABLE) City(COLUMN)Weather(COLUMN)High(COLUMN)Low Acapulco(COLUMN)pt. cldy.(COLUMN)90(COLUMN)72 Barbados(COLUMN)pt. cldy.(COLUMN)85(COLUMN)70 Bermuda(COLUMN)cloudy(COLUMN)69(COLUMN)59 Bogata(COLUMN)cloudy(COLUMN)68(COLUMN)29 Calgary(COLUMN)snow(COLUMN)43(COLUMN)27 Edmonton(COLUMN)snow(COLUMN)41(COLUMN)14 Havana(COLUMN)pt. cldy.(COLUMN)77(COLUMN)63 Kingston(COLUMN)pt. cldy.(COLUMN)88(COLUMN)77 Montego Bay(COLUMN)cloudy(COLUMN)86(COLUMN)72 Mexico City(COLUMN)Haze(COLUMN)81(COLUMN)45 Monterrey(COLUMN)cloudy(COLUMN)61(COLUMN)43 Montreal(COLUMN)snow(COLUMN)9(COLUMN)3 Ottawa(COLUMN)snow(COLUMN)7(COLUMN)3 Regina(COLUMN)snow(COLUMN)7(COLUMN)1 St. Kitts(COLUMN)pt. cldy.(COLUMN)64(COLUMN)71 St. Thomas(COLUMN)clear(COLUMN)84(COLUMN)71 Toronto(COLUMN)snow(COLUMN)27(COLUMN)19 Vancouver(COLUMN)clear(COLUMN)37(COLUMN)27 Veracruz(COLUMN)cloudy(COLUMN)86(COLUMN)66 Winnipeg(COLUMN)clear(COLUMN)3(COLUMN)-24(END TABLE)