Washington: Today - Partly cloudy, high in the low 60s, low in the mid 40s. The chance of rain is near zero through tonight. Wind will be from the northeast at from 5 to 15 mph. Monday - Increasingly cloudy, high near 70.

Maryland and Virginia: Today - Partly cloudy, highs from the 50s to the 60s, low in the 40s. Monday - Increasingly cloudy through most of the area; chance of showers in the moutains, highs from the 60s to the 70s.

Lower Potomac and Chesapeake Bay: Today - Fair with visibility of more than 5 miles, wind will be variable at from 5 to 10 knots. Waves in unprotected waters will be less than 1 foot.

Extended Area Forecast for Tuesday through Thursday: Chance of showers on Tuesday and on Wednesday, partly cloudy on Thursday. Highs will be from the mid 60s to the mid 70s, lows from the upper 40s to the mid 50s. Normal Washington temperatures for the period are a high of 66 and a low of 45.

West Virginia: Today - Increasingly cloudy, highs from the 60s to the mid 70s, lows from the mid 40s to the low 50s. Monday - Rain, highs in the 70s.

The National Weather Forecast for today - Rain, possibly snow in the higher Rockies, will fall from the southern Plateau through the southern and central Rockies and much of the Plains into the Mississippi Valley, Great Lakes and Ohio Valley. Thunderstorms are likely in the Plains, the Great Lakes and the Ohio Valley. Skies will be mostly sunny from the West Coast into the northern Rockies and Great Basin, and through most of the Atlantic Coast. Temperatures will be mild over southern California, from northern California through most of Washington State and from the central Plains through the middle and lower Mississsipi Valley to the southern Atlantic Coast. Most of the remainder of the country will be cool.

Almanac Data for today: Sun rises 5:41 a.m., sets 6:39 p.m.; Moon rises 6:59 a.m., sets 8:51 p.m. High and low tides at the following locations may be obtained by subtracting the hours indicated from the hours above: Annapolis (3 1/4); Bloody Point Lighthouse (4 1/2); Deale, Md. (4 1/2); Colonial Beach (5 3/4); Norfolk (1); Virginia Beach (3/4); Solomons Island (6 1/4); Point Lookout (7).

The Council of Governments' Air Quality Index for yesterday showed the high reading in the Washington area during the 9 a.m. to 10 a.m. period was 29 for the pollutant, photochemical oxidants. Index values between 25 and 49 indicate fair air quality. Whe 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 be fair.

The National Weather Service forecasts the Potomac River stage at Little Falls should be near 4.6 feet today. Local Temp., Humidity(TABLE) Time(COLUMN)T.(COLUMN)H. 12 Mid.(COLUMN)61(COLUMN)41 1 a.m.(COLUMN)63(COLUMN)49 2 a.m.(COLUMN)58(COLUMN)49 3 a.m.(COLUMN)56(COLUMN)55 4 a.m.(COLUMN)56(COLUMN)53 5 a.m.(COLUMN)64(COLUMN)39 6 a.m.(COLUMN)60(COLUMN)41 7 a.m.(COLUMN)59(COLUMN)41 8 a.m.(COLUMN)62(COLUMN)35 9 a.m.(COLUMN)64(COLUMN)21 10 a.m.(COLUMN)65(COLUMN)21 11 a.m.(COLUMN)67(COLUMN)19 12 noon(COLUMN)69(COLUMN)18 1 p.m.(COLUMN)71(COLUMN)18 2 p.m.(COLUMN)73(COLUMN)18 3 p.m.(COLUMN)74(COLUMN)18 4 p.m.(COLUMN)74(COLUMN)18 5 p.m.(COLUMN)73(COLUMN)15 6 p.m.(COLUMN)69(COLUMN)15 (END TABLE) Temperatures ending 7 a.m. (EST) yesterday:(TABLE) City(COLUMN)H.(COLUMN)L. Albany(COLUMN)44(COLUMN)36 Albuquerque(COLUMN)80(COLUMN)45 Amarillo(COLUMN)89(COLUMN)62 Anchorage(COLUMN)44(COLUMN)36 Asheville(COLUMN)78(COLUMN)39 Atlanta(COLUMN)84(COLUMN)52 Atlantic City(COLUMN)65(COLUMN)45 Austin(COLUMN)82(COLUMN)66 Baltimore(COLUMN)74(COLUMN)52 Billings(COLUMN)56(COLUMN)34 Birmingham(COLUMN)86(COLUMN)58 Bismarck(COLUMN)43(COLUMN)31 Boise(COLUMN)49(COLUMN)38 Boston(COLUMN)45(COLUMN)41 Brownsville(COLUMN)87(COLUMN)74 Buffalo(COLUMN)48(COLUMN)32 Burlington(COLUMN)37(COLUMN)33 Casper(COLUMN)69(COLUMN)34 Charleston, S.C.(COLUMN)89(COLUMN)64 Char'ston, W Va.(COLUMN)76(COLUMN)41 Charlotte(COLUMN)82(COLUMN)46 Cheyenne(COLUMN)71(COLUMN)39 Chicago(COLUMN)72(COLUMN)37 Cincinnati(COLUMN)73(COLUMN)44 Cleveland(COLUMN)69(COLUMN)34 Columbia, S.C.(COLUMN)88(COLUMN)42 Columbus(COLUMN)72(COLUMN)42 Dal.-Ft. Worth(COLUMN)87(COLUMN)64 Dayton(COLUMN)72(COLUMN)44 Denver(COLUMN)82(COLUMN)44 Des Moines(COLUMN)76(COLUMN)54 Detroit(COLUMN)68(COLUMN)36 Duluth(COLUMN)45(COLUMN)28 El. Paso(COLUMN)87(COLUMN)49 Fairbanks(COLUMN)45(COLUMN)26 Fargo(COLUMN)41(COLUMN)30 Flagstaff(COLUMN)53(COLUMN)31 Great Falls(COLUMN)44(COLUMN)32 Hartford(COLUMN)49(COLUMN)43 Helena(COLUMN)44(COLUMN)33 Honolulu(COLUMN)85(COLUMN)70 Houston(COLUMN)74(COLUMN)65 Indianapolis(COLUMN)76(COLUMN)52 Jackson, Miss.(COLUMN)86(COLUMN)59 Jacksonville(COLUMN)88(COLUMN)60 Juneau(COLUMN)48(COLUMN)38 Kansas City(COLUMN)78(COLUMN)65 Las Vegas(COLUMN)62(COLUMN)43 Little Rock(COLUMN)88(COLUMN)62 Los Angeles(COLUMN)61(COLUMN)44 Louisville(COLUMN)77(COLUMN)45 Memphis(COLUMN)88(COLUMN)60 Miami Beach(COLUMN)80(COLUMN)63 Midland-Odessa(COLUMN)90(COLUMN)61 Milawkee(COLUMN)64(COLUMN)34 Mpls.-St. Paul(COLUMN)47(COLUMN)36 Nashville(COLUMN)79(COLUMN)46 New Orleans(COLUMN)86(COLUMN)63 New York(COLUMN)63(COLUMN)43 Norfolk(COLUMN)73(COLUMN)54 North Platte(COLUMN)83(COLUMN)48 Oklahoma City(COLUMN)82(COLUMN)63 Omaha(COLUMN)76(COLUMN)58 Orlando(COLUMN)88(COLUMN)62 Philadephia(COLUMN)70(COLUMN)45 Phoenix(COLUMN)79(COLUMN)50 Pittsburgh(COLUMN)72(COLUMN)43 Portland, Maine(COLUMN)45(COLUMN)35 Portland, Ore.(COLUMN)63(COLUMN)42 Providence(COLUMN)45(COLUMN)37 Raleigh(COLUMN)83(COLUMN)40 Rapid City(COLUMN)52(COLUMN)35 Reno(COLUMN)49(COLUMN)39 Richmond(COLUMN)81(COLUMN)52 St. Louis(COLUMN)77(COLUMN)55 St. Prbg-Tampa(COLUMN)85(COLUMN)58 San Antonio(COLUMN)81(COLUMN)68 San Diego(COLUMN)64(COLUMN)52 San Francisco(COLUMN)57(COLUMN)53 San Juan(COLUMN)86(COLUMN)75 St. Ste. Marie(COLUMN)37(COLUMN)18 Seattle(COLUMN)60(COLUMN)45 Shreveport(COLUMN)84(COLUMN)56 Sioux Falls(COLUMN)50(COLUMN)42 Spokane(COLUMN)54(COLUMN)37 Syracuse(COLUMN)47(COLUMN)34 Topeka(COLUMN)80(COLUMN)64 Tucson(COLUMN)80(COLUMN)52 Tulsa(COLUMN)86(COLUMN)63 Washington(COLUMN)77(COLUMN)56 Wichita(COLUMN)82(COLUMN)62(END TABLE) Temperatures Abroad Yesterday(TABLE) City(COLUMN)Weather(COLUMN)Time(COLUMN)Temp. Aberdeen(COLUMN)pt. cldy(COLUMN)1 p.m.(COLUMN)50 Amsterdam(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)45 Ankara(COLUMN)rain(COLUMN)3 p.m.(COLUMN)59 Athens(COLUMN)cloudy(COLUMN)2 p.m.(COLUMN)66 Auckland(COLUMN)cloudy(COLUMN)midnight(COLUMN)66 Berlin(COLUMN)clear(COLUMN)1 p.m.(COLUMN)50 Birmingham(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)45 Brussels(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)41 Casablanca(COLUMN)clear(COLUMN)noon(COLUMN)63 Copenhagen(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)54 Geneva(COLUMN)clear(COLUMN)1 p.m.(COLUMN)50 Hong Kong(COLUMN)rain(COLUMN)8 p.m.(COLUMN)66 Lisbon(COLUMN)clear(COLUMN)noon(COLUMN)61 London(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)45 Madrid(COLUMN)pt. cldy(COLUMN)1 p.M.(COLUMN)55 Malta(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)64 Manila(COLUMN)clear(COLUMN)8 p.m.(COLUMN)81 Moscow(COLUMN)pt. cldy(COLUMN)3 p.m.(COLUMN)37 New Delhi(COLUMN)clear(COLUMN)5 p.m.(COLUMN)95 Nice(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)55 Oslo(COLUMN)clear(COLUMN)1 p.m.(COLUMN)52 Paris(COLUMN)pt. cldy(COLUMN)1 p.m.(COLUMN)46 Peking(COLUMN)cloudy(COLUMN)8 p.m.(COLUMN)64 Rome(COLUMN)rain(COLUMN)1 p.m.(COLUMN)52 Sofia(COLUMN)pt. cldy(COLUMN)2 p.m.(COLUMN)57 Stockholm(COLUMN)pt. cldy(COLUMN)1 p.m.(COLUMN)45 Sydney(COLUMN)cloudy(COLUMN)10 p.m.(COLUMN)70 Tel Aviv(COLUMN)clear(COLUMN)2 p.m.(COLUMN)84 Tokyo(COLUMN)clear(COLUMN)9(COLUMN)59 Tunis(COLUMN)cloudy(COLUMN)1 p.m.(COLUMN)61 Vienna(COLUMN)clear(COLUMN)1 p.m.(COLUMN)54 Warsaw(COLUMN)pt. cldy(COLUMN)1 p.m.(COLUMN)41(END TABLE) Temperatures (Western Hemisphere)(TABLE) City(COLUMN)Weather(COLUMN)High(COLUMN)Low Acapulco(COLUMN)pt. cldy.(COLUMN)89(COLUMN)81 Barbados(COLUMN)cloudy(COLUMN)85(COLUMN)75 Bermuda(COLUMN)cloudy(COLUMN)71(COLUMN)65 Bogota(COLUMN)pt. cldy.(COLUMN)64(COLUMN)50 Culiacan(COLUMN)cloudy(COLUMN)95(COLUMN)66 Havana(COLUMN)clear(COLUMN)80(COLUMN)68 Kingston(COLUMN)clear(COLUMN)87(COLUMN)75 Montego Bay(COLUMN)clear(COLUMN)84(COLUMN)70 Mexico City(COLUMN)clear(COLUMN)78(COLUMN)55 Monterrey(COLUMN)pt. cldy.(COLUMN)91(COLUMN)68 Nassau(COLUMN)clear(COLUMN)80(COLUMN)59 St. Kitts(COLUMN)clear(COLUMN)86(COLUMN)73 St. Thomas(COLUMN)pt. cldy.(COLUMN)84(COLUMN)76 Veracruz(COLUMN)fair(COLUMN)86(COLUMN)70(END TABLE)