Washington: Today - Mostly sunny slightly warmer. High 33 to 36, low 20 to 28. The chance of precipitation is near zero throught tonight. Friday - Increasing cloudiness, chance of rain in the evening, high in the 30s.

Maryland: Today - Mostly sunny, high in the 30s, low in the 20s. Friday - Increasing cloudiness with a chance of rain. High in the upper 30s or low 40s.

Virginia: Today - Mostly sunny, high in the 30s. Friday - Cloudy with a chance of rain by afternoon. High in the 40s.

Extended Area Outlook for Saturday through Monday: Chance of rain Saturday, then variable cloudiness Sunday and Monday. Highs will be in the 40s and lows will be in the mid 20s and mid 30s. Normal Washington temperatures for this period are a high of 43 and a low of 27.

Lower Potomac and Chesapeake Bay: Partly cloudy with excellent visibility, variable winds 5 to 10 knots. Waves will be about one foot.

West Virginia: Today - Partly cloudy with a chance of snow flurries in the north. High in the mid 20s and mid 30s, low in the teens to mid 20s. Friday - Chance of rain, high in the mid 30s to mid 40s.

Almanac Data for today - Sun Rises 7:26 a.m., sets 4:54 p.m.; moon rises 9:04 p.m. sets 9:45 a.m. Tides: high 10:16 a.m. and 10:34 p.m., low 5:01 a.m. and 5:04 p.m. High and low tides at the following locations may be obtained by subtracting the hours indicated from the tides above. Annapolis (1 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 Lockout (7).

The Council of Governments' Air Quality Index for yesterday showed the high reading in the Washington area during the noon period was 13 for the pollutant, photo-chemical oxidants. Index values between 0 and 24 indicate good air quality. When the index exceeds 100 the air is considered very unhealthy and individuals with lung, heart and eye ailments are urged to restrict their activity. The forecast for today indicates that the air quality will remain good.

The National Weather Service forecasts the Potomac River stage at Little Falls should today.

Washington data at 7 p.m. (EDT) yesterday: Highest temperature since 7 a.m. yesterday, 27 degrets at 12:05 p.m. Lowest temperature since midnight, 19 degrees at 7:15 a.m. Excess of temperature since Dec. 1, 22 degrees. Excess of temperature since Jan. 1, 563 degrees. Record high temperature for today, 64 degrees in 1893. Record low temperture for today, 2degrees in 1917. Relative humidity: Maximum, 62 per cent at 6 a.m.; Minimum, 39 per cent at 4 p.m.

24 hour precipitaion, none. Excess of precipitation since Dec. 1, 1.86 inches. Deficiency of precipitation since Jan. 1, 2.71 inches. Highest observed wind since 7 a.m. 15 miles per hour from the north at 9 a.m. Peak gust since 8 a.m. 16 miles per hour from the northwest at 9:41 a.m. Local Temp, Humidity(TABLE) Time(COLUMN)T.(COLUMN)H. 12 midnight(COLUMN)27(COLUMN)53 1 a.m.(COLUMN)25(COLUMN)57 2a.m.(COLUMN)25(COLUMN)55 3 a.m.(COLUMN)24(COLUMN)55L 4 a.m. 23(COLUMN)57 5 a.m.(COLUMN)21(COLUMN)59 6 a.m.(COLUMN)20(COLUMN)62 7a.m.(COLUMN)20(COLUMN)57 8 a.m.(COLUMN)20(COLUMN)54 9 a.m.(COLUMN)21(COLUMN)50 10 a.m.(COLUMN)23$(COLUMN)46 11 a.m.(COLUMN)24(COLUMN)44 12 noon(COLUMN)24(COLUMN)44 1 p.m.(COLUMN)27(COLUMN)40 2 p.m.(COLUMN)27(COLUMN)40 3 p.m.(COLUMN)26(COLUMN)40 4 p.m.(COLUMN)27(COLUMN)39 5 p.m.(COLUMN)26(COLUMN)42 6 p.m.(COLUMN)25(COLUMN)46 7 p.m.(COLUMN)25(COLUMN)44(END TABLE) Temperatures ending 7 a.m. (EST) yesterday:(TABLE) City(COLUMN)(COLUMN). L. Albany(COLUMN)24(COLUMN) 5 Albuquerque(COLUMN)43(COLUMN)37 Amarillo(COLUMN)41$21 Anchorage(COLUMN)33(COLUMN)17 Asheville(COLUMN)34(COLUMN)13 Atlanta(COLUMN)45(COLUMN)17 Atlantic City(COLUMN)29$ 9 Austin(COLUMN)53$44 Baltimore(COLUMN)33(COLUMN)13 Billingsi(COLUMN)24(COLUMN)19 Birmingham(COLUMN)40(COLUMN)21 Boise(COLUMN)35(COLUMN)33 Bismarck(COLUMN)24(COLUMN)17 Boston(COLUMN)31(COLUMN)46 Brownsville(COLUMN)76(COLUMN)64 Buffola(COLUMN)19(COLUMN)10 Burlington, Vt.(COLUMN)19(COLUMN) 0 Casper(COLUMN)32(COLUMN)12 Charleston, S.C.(COLUMN)45(COLUMN)30 Charleston, W.V.(COLUMN)23(COLUMN) 6 Charlotte, N.C.(COLUMN)40(COLUMN)25 Cheyenne(COLUMN)40(COLUMN)17 Chicago(COLUMN) 9(COLUMN) 4 Cincinnati(COLUMN)21(COLUMN) 1 Cleveland(COLUMN)19(COLUMN) 6 Columbia, S.C.(COLUMN)43(COLUMN)20 Columbus, Ohio(COLUMN)19(COLUMN)05 Dal.-Ft. Worth(COLUMN)45(COLUMN)42 Dayton(COLUMN)20(COLUMN) 4 Denver(COLUMN)43(COLUMN)19 Des Moines(COLUMN)19(COLUMN)12 Detroit(COLUMN)19(COLUMN) 8 El Paso(COLUMN)51(COLUMN)41 Fairbanks(COLUMN)18(COLUMN) 5 Fargo(COLUMN)19(COLUMN)11 Flagstaff(COLUMN)47(COLUMN)31 Great Falls(COLUMN)26(COLUMN)18 Hartford(COLUMN)24(COLUMN) 6 Helena(COLUMN)21(COLUMN)-1 Honolulu(COLUMN)79(COLUMN)72 Houston(COLUMN)55(COLUMN)50 Indianapolis(COLUMN)18(COLUMN) 6 Jackson, Miss.(COLUMN)44(COLUMN)31 Jacksonville(COLUMN)50(COLUMN)29 Juneau(COLUMN)38(COLUMN)32 Kansas City(COLUMN)25(COLUMN)17 Las Vegas(COLUMN)52(COLUMN)45 Little Rock(COLUMN)35(COLUMN)25 Los Angeles(COLUMN)65$60 Louisville(COLUMN)26(COLUMN) 9 Memphis(COLUMN)36(COLUMN)24 Miami Beach(COLUMN)63(COLUMN)46 Midland-Odissa(COLUMN)49(COLUMN)37 Milwaukee(COLUMN) 6(COLUMN) 1 Mpls-St. Paul(COLUMN)15(COLUMN) 8 Nashville(COLUMN)34(COLUMN)11 New Orleans(COLUMN)56(COLUMN)39 New York(COLUMN)26(COLUMN)19 Norfolk(COLUMN)35(COLUMN)22 North Platte(COLUMN)35(COLUMN) 9 Oklahoma City(COLUMN)38(COLUMN)30 Omaha(COLUMN)25(COLUMN)16 Orlando(COLUMN)57(COLUMN)51 Philadelphia(COLUMN)24(COLUMN)15 Phoenix(COLUMN)63(COLUMN)53 Pittsburgh(COLUMN)21(COLUMN) 4 Portland, Maine(COLUMN)27(COLUMN) 9 Portland, Ore.(COLUMN)41(COLUMN)34 Providence(COLUMN)26(COLUMN)11 Raleigh(COLUMN)38(COLUMN)20 Rapid City(COLUMN)27(COLUMN) 9 Reno(COLUMN)36(COLUMN)32 Richmond(COLUMN)34(COLUMN)19 St. Louis(COLUMN)20(COLUMN)15 St. Prbg-Tampa(COLUMN)55(COLUMN)33 Salt Lake City(COLUMN)40(COLUMN)35 San Antonio(COLUMN)55(COLUMN)46 San Diego(COLUMN)70(COLUMN)64 San Francisco(COLUMN)58(COLUMN)53 San Juan(COLUMN)87(COLUMN)72 St. Ste. Marie(COLUMN) 5(COLUMN) -5 Seattle(COLUMN)49(COLUMN)35 Shreveport(COLUMN)50(COLUMN)37 Sioux Falls(COLUMN)18(COLUMN) 8 Spokane(COLUMN)18(COLUMN) 2 Syracuse(COLUMN)22(COLUMN)10 Topeka 28(COLUMN)28(COLUMN)12 TTucson(COLUMN)59$52 Tuisa(COLUMN)31$22 Washington(COLUMN)32(COLUMN)20 Wichita(COLUMN)34$19(END TABLE) Temperatures Abroad Yesterday(TABLE) City(COLUMN)Weather(COLUMN)High(COLUMN)Low Acapulco(COLUMN)clear(COLUMN)88(COLUMN)74 Barbados(COLUMN)cloudy(COLUMN)84(COLUMN)76 Bermuda(COLUMN)rain(COLUMN)67(COLUMN)62 Bogota(COLUMN)cloudy(COLUMN)70(COLUMN)50 Calgary(COLUMN)cloudy(COLUMN)32(COLUMN)14 Culiacan(COLUMN)cloudy(COLUMN)86(COLUMN)65 Edmonton(COLUMN)cloudy(COLUMN)25(COLUMN) 9 Havana(COLUMN)fair(COLUMN)68(COLUMN)61 Kingston(COLUMN)pt. cldy(COLUMN)86(COLUMN)75 Montego Bay(COLUMN)cloudy(COLUMN)84(COLUMN)73 Mexico City(COLUMN)clear(COLUMN)59(COLUMN)77 Monterrey(COLUMN)haze(COLUMN)68(COLUMN)54 Montreal(COLUMN)snow(COLUMN)14(COLUMN) 0 Nassau(COLUMN)pt. cldy(COLUMN)73(COLUMN)61 Ottawa(COLUMN)clear(COLUMN) 9(COLUMN) -6 Regina(COLUMN)snow(COLUMN)21(COLUMN)14 St. Kitts(COLUMN)fair(COLUMN)86(COLUMN)72 St. Thomas(COLUMN)fair(COLUMN)85(COLUMN)70 Vancouver(COLUMN)clear(COLUMN)41(COLUMN)23 Veracruz(COLUMN)pt. cldy(COLUMN)73(COLUMN)68 Winnipeg(COLUMN)clear(COLUMN)14(COLUMN)-4(END TABLE)